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In this Document
  Purpose
  Scope
  NAME, LATCH# for V$LATCHNAME for 8.1.7 , 9.2 , 10.2 , 11.1

APPLIES TO:

PURPOSE

V$LATCHNAME:

When referencing Latches for determining performance issues or other problems, it is important to know that not only do differences in the Latch Name exist between RDBMS versions, thesame Latch Name can have a different Latch# for each version of Oracle's RDBMS.

SCOPE

While the basic information for V$LATCHNAME is Novice the typical usage for analysis is Intermediate: Here is a quick reference for V$LATCHNAME : LATCH# and NAME for RDBMS Versions:

Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 

Oracle Database 10g Enterprise Edition Release 10.2.0.4

Oracle9i Enterprise Edition Release 9.2.0.1.0

Oracle8i Enterprise Edition Release 8.1.7.0.0

NAME, LATCH# FOR V$LATCHNAME FOR 8.1.7 , 9.2 , 10.2 , 11.1

Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
0 PC and Classifier lists for WLM 
1 event range base latch 
2 post/wait queue 
3 hot latch diags 
4 test excl. non-parent l0 
5 test excl. parent l0 
6 test excl. parent2 l0 
7 test shared non-parent l0 
8 test excl. non-parent lmax 
9 process allocation 
10 session allocation 
11 session switching 
12 process group creation 
13 session idle bit 
14 client/application info 
15 longop free list parent 
16 ksuosstats global area 
17 ksupkttest latch 
18 cached attr list 
19 ksim membership request latch 
20 object stats modification 
21 kss move lock 
22 parameter table management 
23 ksbxic instance latch 
24 kse signature 
25 messages 
26 enqueues 
27 enqueue hash chains 
28 instance enqueue 
29 trace latch 
30 FOB s.o list latch 
31 FIB s.o chain latch 
32 SGA IO buffer pool latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
33 File IO Stats segmented array latch 
34 KSFQ 
35 X$KSFQP 
36 i/o slave adaptor 
37 ksfv messages 
38 msg queue latch 
39 done queue latch 
40 session queue latch 
41 direct msg latch 
42 vecio buf des 
43 ksfv subheap 
44 resmgr:free threads list 
45 resmgr group change latch 
46 channel handle pool latch 
47 channel operations parent latch 
48 message pool operations parent latch 
49 channel anchor 
50 dynamic channels 
51 ksv instance latch 
52 ksv class latch 
53 ksv msg queue latch 
54 ksv allocation latch 
55 ksv remote inst ops 
56 first spare latch 
57 second spare latch 
58 third spare latch 
59 fourth spare latch 
60 fifth spare latch 
61 ksxp shared latch 
62 IPC stats buffer allocation latch 
63 segmented array pool 
64 granule operation 
65 KSXR large replies 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
66 SGA mapping latch 
67 active service list 
68 database property service latch 
69 OS process allocation 
70 OS process 
71 OS process: request allocation 
72 ksir sga latch 
73 kspoltest latch 
74 ksz_so allocation latch 
75 reid allocation latch 
76 queued dump request 
77 global hanganlyze operation 
78 ges process table freelist 
79 ges process parent latch 
80 ges process hash list 
81 ges resource table freelist 
82 ges caches resource lists 
83 ges resource hash list 
84 ges resource scan list 
85 ges s-lock bitvec freelist 
86 ges enqueue table freelist 
87 ges timeout list 
88 ges deadlock list 
89 ges statistic table 
90 ges synchronous data 
91 KJC message pool free list 
92 KJC receiver ctx free list 
93 KJC snd proxy ctx free list 
94 KJC destination ctx free list 
95 KJC receiver queue access list 
96 KJC snd proxy queue access list 
97 KJC global resend message queue 
98 KJCT receiver queue access 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
99 KJCT flow control latch 
100 KJC global post event buffer 
101 ges domain table 
102 ges group table 
103 gcs resource hash 
104 gcs opaque info freelist 
105 gcs resource freelist 
106 gcs resource scan list 
107 gcs resource validate list 
108 gcs domain validate latch 
109 gcs shadows freelist 
110 gcs commit scn state 
111 name-service entry 
112 name-service request queue 
113 name-service pending queue 
114 name-service namespace bucket 
115 name-service memory objects 
116 name-service namespace objects 
117 name-service request 
118 name-service memory recovery 
119 gcs remastering latch 
120 gcs partitioned table hash 
121 gcs pcm hashed value bucket hash 
122 gcs remaster request queue 
123 recovery domain freelist 
124 recovery domain hash list 
125 ges value block free list 
126 Testing 
127 KMG MMAN ready and startup request latch 
128 KMG resize request state object freelist 
129 Memory Management Latch 
130 file number translation table 
131 mostly latch-free SCN 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
132 lgwr LWN SCN 
133 redo on-disk SCN 
134 ping redo on-disk SCN 
135 Consistent RBA 
136 cache buffers lru chain 
137 buffer pool 
138 multiple dbwriter suspend 
139 active checkpoint queue latch 
140 checkpoint queue latch 
141 cache buffers chains 
142 cache buffer handles 
143 multiblock read objects 
144 cache protection latch 
145 block corruption recovery state 
146 tablespace key chain 
147 cache table scan latch 
148 simulator lru latch 
149 simulator hash latch 
150 sim partition latch 
151 state object free list 
152 object queue header operation 
153 object queue header heap 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
154 Real time apply boundary 
155 LGWR NS Write 
156 archive control 
157 archive process latch 
158 managed standby latch 
159 alert log latch 
160 SGA kcrrgap latch 
161 SGA kcrrpinfo latch 
162 SGA kcrrssncpl latch 
163 SGA kcrrlatmscnl latch 
164 SGA kcrrlac latch 
165 FAL subheap alocation 
166 FAL request queue 
167 Managed Standby Recovery State 
168 redo writing 
169 redo copy 
170 redo allocation 
171 readable standby influx scn 
172 readredo stats and histogram 
173 OS file lock latch 
174 gc element 
175 gc checkpoint 
176 loader state object freelist 
177 begin backup scn array 
178 krbmrosl 
179 logminer work area 
180 logminer context allocation 
181 logical standby cache 
182 logical standby view 
183 media recovery process out of buffers 
184 mapped buffers lru chain 
185 Media rcv so alloc latch 
186 parallel recoverable recovery 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
187 block media rcv so alloc latch 
188 readable standby metadata redo cache 
189 change tracking state change latch 
190 change tracking optimization SCN 
191 change tracking consistent SCN 
192 lock DBA buffer during media recovery 
193 lock new checkpoint scn during media recovery 
194 reservation so alloc latch 
195 Reserved Space Latch 
196 flashback marker cache 
197 flashback FBA barrier 
198 flashback SCN barrier 
199 hint flashback FBA barrier 
200 flashback hint SCN barrier 
201 flashback allocation 
202 flashback mapping 
203 flashback copy 
204 flashback sync request 
205 Minimum flashback SCN latch 
206 Block new check invariant rollback SCN latch 
207 file deallocation SCN cache 
208 Transportable DB Context Latch 
209 cv free list lock 
210 cv apply list lock 
211 io pool granule metadata list 
212 io pool granule list 
213 dml lock allocation 
214 DML lock allocation 
215 list of block allocation 
216 transaction allocation 
217 dummy allocation 
218 transaction branch allocation 
219 commit callback allocation 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
220 undo global data 
221 corrupted undo seg lock 
222 MinActiveScn Latch 
223 parallel txn reco latch 
224 intra txn parallel recovery 
225 Undo Hint Latch 
226 resumable state object 
227 In memory undo latch 
228 KTF sga latch 
229 MQL Tracking Latch 
230 Change Notification Hash table latch 
231 Change Notification Latch 
232 flashback archiver latch 
233 change notification client cache latch 
234 sort extent pool 
235 lob segment hash table latch 
236 lob segment query latch 
237 lob segment dispenser latch 
238 shrink stat allocation latch 
239 file cache latch 
240 ktm global data 
241 space background SGA latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
242 space background task latch 
243 space background state object latch 
244 sequence cache 
245 temp lob duration state obj allocation 
246 kssmov protection latch 
247 File State Object Pool Parent Latch 
248 Write State Object Pool Parent Latch 
249 deferred cleanup latch 
250 domain validation update latch 
251 kdlx hb parent latch 
252 Locator state objects pool parent latch 
253 row cache objects 
254 KQF runtime table column alloc 
255 QOL Name Generation Latch 
256 dictionary lookup 
257 kks stats 
258 kkae edition name cache 
259 KKCN reg stat latch 
260 KKCN grp reg latch 
261 KKCN grp data latch 
262 global KZLD latch for mem in SGA 
263 cost function 
264 user lock 
265 Policy Refresh Latch 
266 Policy Hash Table Latch 
267 OLS label cache 
268 instance information 
269 policy information 
270 global ctx hash table latch 
271 Role grants to users 
272 Role graph 
273 Security Class Hashtable 
274 global tx hash mapping 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
275 k2q lock allocation 
276 k2q global data latch 
277 shared pool 
278 library cache load lock 
279 Token Manager 
280 cas latch 
281 rm cas latch 
282 resmgr:actses change state 
283 resmgr:actses change group 
284 resmgr:session queuing 
285 resmgr:active threads 
286 resmgr:schema config 
287 resmgr:vc list latch 
288 resmgr:incr/decr stats 
289 resmgr:method mem alloc latch 
290 resmgr:plan CPU method 
291 resmgr:resource group CPU method 
292 QMT 
293 shared pool simulator 
294 shared pool sim alloc 
295 Streams Generic 
296 Shared B-Tree 
297 Memory Queue 
298 Memory Queue Subscriber 
299 Memory Queue Message Subscriber #1 
300 Memory Queue Message Subscriber #2 
301 Memory Queue Message Subscriber #3 
302 Memory Queue Message Subscriber #4 
303 pesom_hash_node 
304 pesom_free_list 
305 pesom_heap_alloc 
306 peshm 
307 Mutex 
308 Mutex Stats 
309 pebof_rrv 
310 ODM-NFS:Global file structure 
311 KGNFS-NFS:SHM structure 
312 KGNFS-NFS:SVR LIST 
313 SGA heap creation lock 
314 SGA heap locks 
315 SGA pool creation lock 
316 SGA pool locks 
317 SGA bucket locks 
318 SGA blob lock 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
319 SGA blob parent 
320 kgb latch 
321 kgb parent 
322 SGA table lock 
323 Event Group Locks 
324 SGA slab metadata lock 
325 Sage HT Latch 
326 shared server configuration 
327 session timer 
328 parameter list 
329 presentation list 
330 address list 
331 end-point list 
332 shared server info 
333 dispatcher info 
334 virtual circuit buffers 
335 virtual circuit queues 
336 virtual circuits 
337 virtual circuit holder 
338 kmcptab latch 
339 kmcpvec latch 
340 cp pool array latch 
341 cp cmon array latch 
342 cp server array latch 
343 cp server hash latch 
344 cp cso latch 
345 cp pool latch 
346 cp cmon/server latch 
347 cp holder latch 
348 cp sga latch 
349 JOX SGA heap latch 
350 JOX JIT latch 
351 job_queue_processes parameter latch 
352 job workq parent latch 
353 job_queue_processes free list latch 
354 query server process 
355 query server freelists 
356 error message lists 
357 process queue 
358 process queue reference 
359 parallel query stats 
360 business card 
361 parallel query alloc buffer 
362 hash table modification latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
363 hash table column usage latch 
364 constraint object allocation 
365 device information 
366 temporary table state object allocation 
367 internal temp table object number allocation latch 
368 SQL memory manager latch 
369 SQL memory manager workarea list latch 
370 compile environment latch 
371 Bloom filter list latch 
372 Bloom Filter SGA latch 
373 Result Cache: Latch 
374 Result Cache: SO Latch 
375 kupp process latch 
376 pass worker exception to master 
377 datapump job fixed tables latch 
378 datapump attach fixed tables latch 
379 process 
380 TXN SGA 
381 STREAMS LCR 
382 STREAMS Pool Advisor 
383 kokc descriptor allocation latch 
384 ncodef allocation latch 
385 NLS data objects 
386 kpon job info latch 
387 kpon sga structure 
388 reg$ timeout service time 
389 KPON ksr channel latch 
390 EMON slave state object latch 
391 session state list latch 
392 kpplsSyncStateListSga: lock 
393 connection pool sga data lock 
394 message enqueue sync latch 
395 image handles of buffered messages latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
396 kwqi:kchunk latch 
397 KWQP Prop Status 
398 KWQS pqueue ctx latch 
399 KWQS pqsubs latch 
400 AQ Propagation Scheduling Proc Table 
401 AQ Propagation Scheduling System Load 
402 job queue sob latch 
403 rules engine aggregate statistics 
404 rules engine rule set statistics 
405 rules engine rule statistics 
406 rules engine evaluation context statistics 
407 enqueue sob latch 
408 kwqbsgn:msghdr 
409 kwqbsn:qxl 
410 kwqbsn:qsga 
411 kwqbcco:cco 
412 bufq statistics 
413 spilled messages latch 
414 queue sender's info. latch 
415 bq:time manger info latch 
416 qmn task queue latch 
417 qmn task context latch 
418 qmn state object latch 
419 KWQMN job cache list latch 
420 KWQMN to-be-Stopped Buffer list Latch 
421 fixed table rows for x$hs_session 
422 qm_init_sga 
423 XDB unused session pool 
424 XDB used session pool 
425 XDB Config-1 
426 XDB Config-2 
427 XDB Config-3 
428 qmtmrcsg_init 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
429 XML DB Events 
430 XDB NFS Stateful SGA Latch 
431 qmne Export Table Latch 
432 XDB NFS Security Latch 
433 XDB Byte Lock SGA Latch 
434 XDB Mcache SGA Latch 
435 XDB PL/SQL Support 
436 DMON Work Queues Latch 
437 DMON Network Error List Latch 
438 RSM process latch 
439 NSV command ID generation latch 
440 NSV creation/termination latch 
441 Request id generation latch 
442 Fast-Start Failover State Latch 
443 xscalc freelist 
444 xssinfo freelist 
445 AW SGA latch 
446 ASM allocation 
447 KFA SGA latch 
448 buffer pin latch 
449 KFC SGA latch 
450 KFC LRU latch 
451 KFC Hash Latch 
452 KFC FX Hash Latch 
453 ASM map headers 
454 ASM map operation freelist 
455 ASM map operation hash table 
456 ASM map load waiting list 
457 KFK SGA Libload latch 
458 KFM allocation 
459 KFMD SGA 
460 ASM network background latch 
461 ASM network SGA latch 
462 ASM db client latch 
463 ASM file locked extent latch 
464 ASM scan context latch 
465 ASM file allocation latch 
466 KFR redo allocation latch 
467 ASM rollback operations 
468 KFCL LE Freelist 
469 KFCL Instance Latch 
470 KFCL BX Freelist 
471 ASM attribute latch 
472 ASM Volume process latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
473 ASM Volume SGA latch 
474 OFS SGA Latch 
475 server alert latch 
476 generalized trace enabling latch 
477 statistics aggregation 
478 AWR Alerted Metric Element list 
479 threshold alerts latch 
480 WCR: kecu cas mem 
481 WCR: ticker cache 
482 Real-time plan statistics latch 
483 JS broadcast add buf latch 
484 JS broadcast drop buf latch 
485 JS broadcast kill buf latch 
486 JS broadcast load blnc latch 
487 JS broadcast autostart latch 
488 JS broadcast LW Job latch 
489 JS mem alloc latch 
490 JS slv state obj latch 
491 JS queue state obj latch 
492 JS queue access latch 
493 JS Sh mem access 
494 PL/SQL warning settings 
495 dbkea msgq latch 

496 rows selected. 

Oracle Database 10g Enterprise Edition Release 10.2.0.4

LATCH# NAME 
---------- -------------------------------------------------- 
0 event range base latch 
1 post/wait queue 
2 hot latch diags 
3 process allocation 
4 session allocation 
5 session switching 
6 process group creation 
7 session idle bit 
8 client/application info 
9 longop free list parent 
10 ksuosstats global area 
11 ksupkttest latch 
12 cached attr list 
13 object stats modification 
14 Testing 
15 parameter table allocation management 
16 event group latch 
17 messages 
18 enqueues 
19 enqueue hash chains 
20 instance enqueue 
21 trace latch 
22 FOB s.o list latch 
23 FIB s.o chain latch 
24 SGA IO buffer pool latch 
25 KSFQ 
26 X$KSFQP 
27 i/o slave adaptor 
28 ksfv messages 
29 msg queue latch 
30 done queue latch 
31 session queue latch 
32 direct msg latch 

LATCH# NAME 
---------- -------------------------------------------------- 
33 vecio buf des 
34 ksfv subheap 
35 resmgr group change latch 
36 channel handle pool latch 
37 channel operations parent latch 
38 message pool operations parent latch 
39 channel anchor 
40 dynamic channels 
41 ksv instance 
42 slave class create 
43 slave class 
44 msg queue 
45 first spare latch 
46 second spare latch 
47 ksxp tid allocation 
48 segmented array pool 
49 granule operation 
50 KSXR large replies 
51 SGA mapping latch 
52 active service list 
53 database property service latch 
54 OS process allocation 
55 OS process 
56 OS process: request allocation 
57 ksir sga latch 
58 queued dump request 
59 global hanganlyze operation 
60 ges process table freelist 
61 ges process parent latch 
62 ges process hash list 
63 ges resource table freelist 
64 ges caches resource lists 
65 ges resource hash list 

LATCH# NAME 
---------- -------------------------------------------------- 
66 ges resource scan list 
67 ges s-lock bitvec freelist 
68 ges enqueue table freelist 
69 ges timeout list 
70 ges deadlock list 
71 ges statistic table 
72 ges synchronous data 
73 KJC message pool free list 
74 KJC receiver ctx free list 
75 KJC snd proxy ctx free list 
76 KJC destination ctx free list 
77 KJC receiver queue access list 
78 KJC snd proxy queue access list 
79 KJC global resend message queue 
80 KJCT receiver queue access 
81 KJCT flow control latch 
82 KJC global post event buffer 
83 ges domain table 
84 ges group table 
85 gcs resource hash 
86 gcs opaque info freelist 
87 gcs resource freelist 
88 gcs resource scan list 
89 gcs resource validate list 
90 gcs domain validate latch 
91 gcs shadows freelist 
92 gcs commit scn state 
93 gcs drop object freelist 
94 name-service entry 
95 name-service request queue 
96 name-service pending queue 
97 name-service namespace bucket 
98 name-service memory objects 

LATCH# NAME 
---------- -------------------------------------------------- 
99 name-service namespace objects 
100 name-service request 
101 gcs remastering latch 
102 gcs partitioned table hash 
103 gcs pcm hashed value bucket hash 
104 gcs remaster request queue 
105 recovery domain freelist 
106 recovery domain hash list 
107 KMG MMAN ready and startup request latch 
108 KMG resize request state object freelist 
109 Memory Management Latch 
110 Memory Management Parameter Latch 
111 file number translation table 
112 mostly latch-free SCN 
113 lgwr LWN SCN 
114 redo on-disk SCN 
115 ping redo on-disk SCN 
116 Consistent RBA 
117 cache buffers lru chain 
118 buffer pool 
119 multiple dbwriter suspend 
120 active checkpoint queue latch 
121 checkpoint queue latch 
122 cache buffers chains 
123 cache buffer handles 
124 multiblock read objects 
125 cache protection latch 
126 cache table scan latch 
127 simulator lru latch 
128 simulator hash latch 
129 sim partition latch 
130 state object free list 
131 object queue header operation 

LATCH# NAME 
---------- -------------------------------------------------- 
132 object queue header heap 
133 Real time apply boundary 
134 LGWR NS Write 
135 archive control 
136 archive process latch 
137 managed standby latch 
138 alert log latch 
139 SGA kcrrgap latch 
140 SGA kcrrpinfo latch 
141 SGA kcrrssncpl latch 
142 SGA kcrrlatmscnl latch 
143 Managed Standby Recovery State 
144 FAL subheap alocation 
145 FAL request queue 
146 redo writing 
147 redo copy 
148 redo allocation 
149 OS file lock latch 
150 KCL gc element parent latch 
151 loader state object freelist 
152 begin backup scn array 
153 krbmrosl 

LATCH# NAME 
---------- -------------------------------------------------- 
154 logminer work area 
155 logminer context allocation 
156 logical standby cache 
157 logical standby view 
158 media recovery process out of buffers 
159 mapped buffers lru chain 
160 Media rcv so alloc latch 
161 parallel recoverable recovery 
162 block media rcv so alloc latch 
163 change tracking state change latch 
164 change tracking optimization SCN 
165 change tracking consistent SCN 
166 reservation so alloc latch 
167 Reserved Space Latch 
168 flashback marker cache 
169 flashback FBA barrier 
170 flashback SCN barrier 
171 hint flashback FBA barrier 
172 flashback hint SCN barrier 
173 flashback allocation 
174 flashback mapping 
175 flashback copy 
176 flashback sync request 
177 Transportable DB Context Latch 
178 dml lock allocation 
179 list of block allocation 
180 transaction allocation 
181 dummy allocation 
182 transaction branch allocation 
183 commit callback allocation 
184 sort extent pool 
185 shrink stat allocation latch 
186 file cache latch 

LATCH# NAME 
---------- -------------------------------------------------- 
187 undo global data 
188 ktm global data 
189 parallel txn reco latch 
190 intra txn parallel recovery 
191 Undo Hint Latch 
192 resumable state object 
193 In memory undo latch 
194 KTF sga latch 
195 MQL Tracking Latch 
196 Change Notification Hash table latch 
197 Change Notification Latch 
198 sequence cache 
199 temp lob duration state obj allocation 
200 row cache objects 
201 QOL Name Generation Latch 
202 dictionary lookup 
203 kks stats 
204 global KZLD latch for mem in SGA 
205 cost function 
206 user lock 
207 Policy Refresh Latch 
208 Policy Hash Table Latch 
209 OLS label cache 
210 instance information 
211 policy information 
212 global ctx hash table latch 
213 global tx hash mapping 
214 shared pool 
215 library cache 
216 library cache lock 
217 library cache pin 
218 library cache pin allocation 
219 library cache lock allocation 

LATCH# NAME 
---------- -------------------------------------------------- 
220 library cache load lock 
221 library cache hash chains 
222 Token Manager 
223 cas latch 
224 rm cas latch 
225 resmgr:runnable lists 
226 resmgr:actses change state 
227 resmgr:actses change group 
228 resmgr:session queuing 
229 resmgr:active threads 
230 resmgr:free threads list 
231 resmgr:schema config 
232 resmgr:gang list 
233 resmgr:queued list 
234 resmgr:running actses count 
235 resmgr:vc list latch 
236 resmgr:incr/decr stats 
237 resmgr:method mem alloc latch 
238 resmgr:plan CPU method 
239 resmgr:resource group CPU method 
240 QMT 
241 shared pool simulator 

LATCH# NAME 
---------- -------------------------------------------------- 
242 shared pool sim alloc 
243 Streams Generic 
244 Shared B-Tree 
245 Memory Queue 
246 Memory Queue Subscriber 
247 Memory Queue Message Subscriber #1 
248 Memory Queue Message Subscriber #2 
249 Memory Queue Message Subscriber #3 
250 Memory Queue Message Subscriber #4 
251 peplm 
252 Mutex 
253 Mutex Stats 
254 pebof_rrv 
255 shared server configuration 
256 session timer 
257 parameter list 
258 presentation list 
259 address list 
260 end-point list 
261 shared server info 
262 dispatcher info 
263 shared server spare latch 1 
264 shared server spare latch 2 
265 shared server spare latch 3 
266 virtual circuit buffers 
267 virtual circuit queues 
268 virtual circuits 
269 kmcptab latch 
270 kmcpvec latch 
271 JOX SGA heap latch 
272 job_queue_processes parameter latch 
273 job workq parent latch 
274 job_queue_processes free list latch 

LATCH# NAME 
---------- -------------------------------------------------- 
275 query server process 
276 query server freelists 
277 error message lists 
278 process queue 
279 process queue reference 
280 parallel query stats 
281 business card 
282 parallel query alloc buffer 
283 hash table modification latch 
284 hash table column usage latch 
285 constraint object allocation 
286 device information 
287 temporary table state object allocation 
288 internal temp table object number allocation latch 
289 SQL memory manager latch 
290 SQL memory manager workarea list latch 
291 compile environment latch 
292 Bloom filter list latch 
293 Bloom Filter SGA latch 
294 bug fix control action latch 
295 kupp process latch 
296 pass worker exception to master 
297 datapump job fixed tables latch 
298 datapump attach fixed tables latch 
299 process 
300 TXN SGA 
301 STREAMS LCR 
302 STREAMS Pool Advisor 
303 kokc descriptor allocation latch 
304 ncodef allocation latch 
305 NLS data objects 
306 kpon sga structure 
307 numer of job queues for server notfn 
308 reg$ timeout service time 
309 KPON ksr channel latch 
310 session state list latch 
311 message enqueue sync latch 
312 image handles of buffered messages latch 
313 kwqi:kchunk latch 
314 KWQP Prop Status 
315 AQ Propagation Scheduling Proc Table 
316 AQ Propagation Scheduling System Load 
317 job queue sob latch 
318 rules engine aggregate statistics 

LATCH# NAME 
---------- -------------------------------------------------- 
319 rules engine rule set statistics 
320 rules engine rule statistics 
321 rules engine evaluation context statistics 
322 enqueue sob latch 
323 kwqbsgn:msghdr 
324 kwqbsn:qxl 
325 kwqbsn:qsga 
326 kwqbcco:cco 
327 bufq statistics 
328 spilled messages latch 
329 queue sender's info. latch 
330 bq:time manger info latch 
331 qmn task queue latch 
332 qmn state object latch 
333 KWQMN job cache list latch 
334 KWQMN to-be-Stopped Buffer list Latch 
335 fixed table rows for x$hs_session 
336 qm_init_sga 
337 XDB unused session pool 
338 XDB used session pool 
339 XDB Config 
340 DMON Process Context Latch 
341 DMON Work Queues Latch 
342 DMON Network Error List Latch 
343 RSM process latch 
344 RSM SQL latch 
345 NSV command ID generation latch 
346 NSV creation/termination latch 
347 Request id generation latch 
348 Fast-Start Failover State Latch 
349 xscalc freelist 
350 xssinfo freelist 
351 AW SGA latch 
352 ASM allocation 
353 KFA SGA latch 
354 buffer pin latch 
355 KFC SGA latch 
356 KFC LRU latch 
357 KFC Hash Latch 
358 KFC FX Hash Latch 
359 ASM map headers 
360 ASM map operation freelist 
361 ASM map operation hash table 
362 ASM map load waiting list 

LATCH# NAME 
---------- -------------------------------------------------- 
363 KFK SGA context latch 
364 KFM allocation 
365 KFMD SGA 
366 ASM network background latch 
367 ASM db client latch 
368 ASM file allocation latch 
369 ASM file locked extent latch 
370 KFR redo allocation latch 
371 ASM rollback operations 
372 KFCL LE Freelist 
373 KFCL Instance Latch 
374 KFCL BX Freelist 
375 server alert latch 
376 generalized trace enabling latch 
377 statistics aggregation 
378 AWR Alerted Metric Element list 
379 threshold alerts latch 
380 alert memory latch 
381 WCR: kecu cas mem 
382 JS broadcast add buf latch 
383 JS broadcast drop buf latch 
384 JS broadcast kill buf latch 
385 JS event notify broadcast latch 
386 JS broadcast load blnc latch 
387 JS broadcast autostart latch 
388 JS mem alloc latch 
389 JS slv state obj latch 
390 JS queue state obj latch 
391 JS queue access latch 
392 JS Sh mem access 
393 PL/SQL warning settings 

394 rows selected. 

Oracle9i Enterprise Edition Release 9.2.0.1.0

LATCH# NAME
---------- ---------------------------------------------------------------- 
0 latch wait list 
1 event range base latch 
2 post/wait queue 
3 process allocation 
4 session allocation 
5 session switching 
6 process group creation 
7 session idle bit 
8 longop free list parent 
9 cached attr list 
10 object stats modification 
11 Testing 
12 shared java pool 
13 latch for background adjusted parameters 
14 event group latch 
15 messages 
16 enqueues 
17 enqueue hash chains 
18 instance enqueue 
19 trace latch 
20 FOB s.o list latch 
21 FIB s.o chain latch 
22 KSFQ 
23 X$KSFQP 
24 i/o slave adaptor 
25 ksfv messages 
26 msg queue latch 
27 done queue latch 
28 session queue latch 
29 direct msg latch 
30 vecio buf des 
31 ksfv subheap 
32 resmgr group change latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
33 channel handle pool latch 
34 channel operations parent latch 
35 message pool operations parent latch 
36 channel anchor 
37 dynamic channels 
38 first spare latch 
39 second spare latch 
40 ksxp tid allocation 
41 segmented array pool 
42 granule operation 
43 KSXR large replies 
44 SGA mapping latch 
45 ges process table freelist 
46 ges process parent latch 
47 ges process hash list 
48 ges resource table freelist 
49 ges caches resource lists 
50 ges resource hash list 
51 ges resource scan list 
52 ges s-lock bitvec freelist 
53 ges enqueue table freelist 
54 ges timeout list 
55 ges deadlock list 
56 ges statistic table 
57 ges synchronous data 
58 KJC message pool free list 
59 KJC receiver ctx free list 
60 KJC snd proxy ctx free list 
61 KJC destination ctx free list 
62 KJC receiver queue access list 
63 KJC snd proxy queue access list 
64 KJCT receiver queue access 
65 KJCT flow control latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
66 ges domain table 
67 ges group table 
68 ges group parent 
69 gcs resource hash 
70 gcs opaque info freelist 
71 gcs resource freelist 
72 gcs resource scan list 
73 gcs shadows freelist 
74 name-service entry 
75 name-service request queue 
76 name-service pending queue 
77 name-service namespace bucket 
78 name-service memory objects 
79 name-service namespace objects 
80 name-service request 
81 ges struct kjmddp 
82 gcs partitioned table hash 
83 gcs pcm hashed value bucket hash 
84 gcs partitioned freelist 
85 gcs remaster request queue 
86 file number translation table 
87 mostly latch-free SCN 
88 lgwr LWN SCN 
89 redo on-disk SCN 
90 Consistent RBA 
91 batching SCNs 
92 cache buffers lru chain 
93 buffer pool 
94 multiple dbwriter suspend 
95 active checkpoint queue latch 
96 checkpoint queue latch 
97 cache buffers chains 
98 cache buffer handles 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
99 multiblock read objects 
100 cache protection latch 
101 simulator lru latch 
102 simulator hash latch 
103 sim partition latch 
104 state object free list 
105 archive control 
106 archive process latch 
107 managed standby latch 
108 FAL subheap alocation 
109 FAL request queue 
110 alert log latch 
111 redo writing 
112 redo copy 
113 redo allocation 
114 OS file lock latch 
115 KCL instance latch 
116 KCL gc element parent latch 
117 KCL name table parent latch 
118 KCL freelist parent latch 
119 KCL bast context freelist latch 
120 loader state object freelist 
121 begin backup scn array 
122 Managed Standby Recovery State 
123 TLCR context 
124 TLCR meta context 
125 logical standby cache 
126 Media rcv so alloc latch 
127 parallel recoverable recovery 
128 block media rcv so alloc latch 
129 mapped buffers lru chain 
130 dml lock allocation 
131 list of block allocation 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
132 transaction allocation 
133 dummy allocation 
134 transaction branch allocation 
135 commit callback allocation 
136 sort extent pool 
137 undo global data 
138 ktm global data 
139 parallel txn reco latch 
140 intra txn parallel recovery 
141 resumable state object 
142 sequence cache 
143 temp lob duration state obj allocation 
144 row cache enqueue latch 
145 row cache objects 
146 dictionary lookup 
147 cost function 
148 user lock 
149 global ctx hash table latch 
150 comparison bit cache 
151 instance information 
152 policy information 
153 global tx hash mapping 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
154 shared pool 
155 library cache 
156 library cache pin 
157 library cache pin allocation 
158 library cache load lock 
159 Token Manager 
160 Direct I/O Adaptor 
161 cas latch 
162 rm cas latch 
163 resmgr:runnable lists 
164 resmgr:actses change state 
165 resmgr:actses change group 
166 resmgr:session queuing 
167 resmgr:actses active list 
168 resmgr:schema config 
169 resmgr:gang list 
170 resmgr:queued list 
171 resmgr:running actses count 
172 resmgr:vc list latch 
173 resmgr:method mem alloc latch 
174 resmgr:plan CPU method 
175 resmgr:resource group CPU method 
176 QMT 
177 dispatcher configuration 
178 session timer 
179 parameter list 
180 presentation list 
181 address list 
182 end-point list 
183 virtual circuit buffers 
184 virtual circuit queues 
185 virtual circuits 
186 kmcptab latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
187 kmcpvec latch 
188 JOX SGA heap latch 
189 job_queue_processes parameter latch 
190 job workq parent latch 
191 child cursor hash table 
192 query server process 
193 query server freelists 
194 error message lists 
195 process queue 
196 process queue reference 
197 parallel query stats 
198 parallel query alloc buffer 
199 hash table modification latch 
200 hash table column usage latch 
201 constraint object allocation 
202 device information 
203 temporary table state object allocation 
204 internal temp table object number allocation latch 
205 SQL memory manager latch 
206 SQL memory manager workarea list latch 
207 ncodef allocation latch 
208 NLS data objects 
209 numer of job queues for server notfn 
210 message enqueue sync latch 
211 bufq subscriber channel 
212 non-pers queues instances 
213 queue sender's info. latch 
214 browsers latch 
215 enqueue buffered messages latch 
216 dequeue sob latch 
217 spilled messages latch 
218 spilled msgs queues list latch 
219 dynamic channels context latch 

LATCH# NAME 
---------- ---------------------------------------------------------------- 
220 image handles of buffered messages latch 
221 kwqit: protect wakeup time 
222 KWQP Prop Status 
223 AQ Propagation Scheduling Proc Table 
224 AQ Propagation Scheduling System Load 
225 process 
226 fixed table rows for x$hs_session 
227 qm_init_sga 
228 XDB unused session pool 
229 XDB used session pool 
230 XDB Config 
231 DMON Process Context Latch 
232 DMON Work Queues Latch 
233 RSM process latch 
234 RSM SQL latch 
235 Request id generation latch 
236 xscalc freelist 
237 xssinfo freelist 
238 AW SGA latch 

239 rows selected. 

Oracle8i Enterprise Edition Release 8.1.7.0.0 

LATCH# NAME 
---------- ----------------------------------------------------------- 
0 latch wait list 
1 process allocation 
2 session allocation 
3 session switching 
4 process group creation 
5 session idle bit 
6 longop free list 
7 cached attr list 
8 GDS latch 
9 shared java pool 
10 event group latch 
11 messages 
12 enqueues 
13 enqueue hash chains 
14 trace latch 
15 KSFQ 
16 X$KSFQP 
17 i/o slave adaptor 
18 ksfv messages 
19 msg queue latch 
20 done queue latch 
21 session queue latch 
22 direct msg latch 
23 vecio buf des 
24 ksfv subheap 
25 resmgr group change latch 
26 channel handle pool latch 
27 channel operations parent latch 
28 message pool operations parent latch 
29 first spare latch 
30 second spare latch 
31 dlm process table freelist 
32 process parent latch 

LATCH# NAME 
---------- ----------------------------------------------------------- 
33 dlm process hash list 
34 dlm resource table freelist 
35 dlm resource hash list 
36 dlm resource scan list 
37 dlm lock table freelist 
38 dlm cr info freelist latch 
39 dlm timeout list 
40 dlm deadlock list 
41 dlm statistic table latch 
42 dlm synchronous data latch 
43 dlm shared communication latch 
44 dlm recovery domain table latch 
45 dlm recovery domain record latch 
46 dlm domain table latch 
47 dlm domain lock latch 
48 dlm domain lock table latch 
49 dlm group table freelist 
50 dlm group lock latch 
51 dlm group lock table latch 
52 name-service entry 
53 name-service request queue 
54 name-service pending queue 
55 name-service namespace bucket 
56 name-service memory objects 
57 name-service request 
58 dlm cr request queue latch 
59 file number translation table 
60 mostly latch-free SCN 
61 batching SCNs 
62 cache buffers lru chain 
63 multiple dbwriter suspend 
64 active checkpoint queue latch 
65 checkpoint queue latch 

LATCH# NAME 
---------- ----------------------------------------------------------- 
66 cache buffers chains 
67 cache buffer handles 
68 multiblock read objects 
69 cache protection latch 
70 large memory latch 
71 simulator lru latch 
72 simulator hash latch 
73 archive control 
74 archive process latch 
75 redo allocation 
76 redo copy 
77 redo writing 
78 KCL instance latch 
79 KCL lock element parent latch 
80 KCL name table latch 
81 KCL freelist latch 
82 loader state object freelist 
83 begin backup scn array 
84 dml lock allocation 
85 list of block allocation 
86 transaction allocation 
87 transaction branch allocation 
88 sort extent pool 
89 undo global data 
90 ktm global data 
91 parallel txn reco latch 
92 intra txn parallel recovery 
93 sequence cache 
94 temp lob duration state obj allocation 
95 row cache objects 
96 dictionary lookup 
97 cost function 
98 user lock 

LATCH# NAME 
---------- ----------------------------------------------------------- 
99 comparison bit cache 
100 instance information 
101 policy information 
102 global tx free list 
103 global transaction 
104 global tx hash mapping 
105 shared pool 
106 library cache 
107 library cache load lock 
108 Token Manager 
109 Direct I/O Adaptor 
110 cas latch 
111 resmgr:runnable lists 
112 resmgr:actses change state 
113 resmgr:actses change group 
114 resmgr:session queuing 
115 resmgr:actses active list 
116 resmgr:schema config 
117 resmgr:gang list 
118 resmgr:queued list 
119 resmgr:running actses count 
120 resmgr:method mem alloc latch 
121 resmgr:plan CPU method 
122 resmgr:resource group CPU method 
123 dispatcher configuration 
124 session timer 
125 parameter list 
126 presentation list 
127 address list 
128 end-point list 
129 virtual circuit buffers 
130 virtual circuit queues 
131 virtual circuits 

LATCH# NAME 
---------- ----------------------------------------------------------- 
132 ncodef allocation latch 
133 NLS data objects 
134 JOX SGA heap latch 
135 job_queue_processes parameter latch 
136 query server process 
137 query server freelists 
138 error message lists 
139 process queue 
140 process queue reference 
141 parallel query stats 
142 parallel query alloc buffer 
143 temp table ageout allocation latch 
144 hash table modification latch 
145 constraint object allocation 
146 device information 
147 temporary table state object allocation 
148 kwqit: protect wakeup time 
149 AQ Propagation Scheduling Proc Table 
150 AQ Propagation Scheduling System Load 
151 fixed table rows for x$hs_session 
152 
152 rows selected. 

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