DBA不復制粘貼，你還能做些什麽？思考一下
阿新 • • 發佈：2018-12-24
lap phy RoCE use sql sql*plus 查看 學習方式 ext 在客戶現場查看文檔，照著命令敲，其實是很LOW的一件事，問題是很多時候，現場不允許帶著你的筆記本和手機，你怎麽辦。很多常用的命令需要我們記住，隨手捏來，每天花費半個小時邊敲邊理解是很好學習方式。
下面的診斷命令你能在理解的基礎上盲敲下來麽？？？
[root@11g-ocp ~]# date Mon Dec 24 06:40:05 CST 2018 [root@11g-ocp ~]# su - oracle <11g-ocp:orcl:/home/oracle>$sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Mon Dec 24 06:40:12 2018 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, Automatic Storage Management, OLAP and Real Application Testing options SQL> select sysdate from dual; SYSDATE ----------------------- 24-DEC-2018 06:40:18 SQL> oradebug setmypid; Statement processed. SQL> oradebug event 10046 trace name context forever,level 12; Statement processed. SQL> select count(*) from t; COUNT(*) ---------- 1 SQL> oradebug event 10046 trace name context off; Statement processed. SQL> oradebug tracefile_name; /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_2761.trc SQL> !tkprof /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_2761.trc ./1224.trc TKPROF: Release 11.2.0.4.0 - Development on Mon Dec 24 06:41:30 2018 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. SQL> !more ./1224.trc TKPROF: Release 11.2.0.4.0 - Development on Mon Dec 24 06:41:30 2018 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. Trace file: /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_2761.trc Sort options: default ******************************************************************************** count = number of times OCI procedure was executed cpu = cpu time in seconds executing elapsed = elapsed time in seconds executing disk = number of physical reads of buffers from disk query = number of buffers gotten for consistent read current = number of buffers gotten in current mode (usually for update) rows = number of rows processed by the fetch or execute call ******************************************************************************** SQL ID: cyzznbykb509s Plan Hash: 2966233522 select count(*) from t call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.00 0.00 0 0 0 0 Execute 1 0.00 0.00 0 0 0 0 Fetch 2 0.00 0.00 0 2 0 1 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 4 0.00 0.00 0 2 0 1 Misses in library cache during parse: 0 Optimizer mode: ALL_ROWS Parsing user id: SYS Number of plan statistics captured: 1 Rows (1st) Rows (avg) Rows (max) Row Source Operation ---------- ---------- ---------- --------------------------------------------------- 1 1 1 SORT AGGREGATE (cr=2 pr=0 pw=0 time=65 us) 1 1 1 TABLE ACCESS FULL T (cr=2 pr=0 pw=0 time=37 us cost=2 size=0 card=1) Elapsed times include waiting on following events: Event waited on Times Max. Wait Total Waited ---------------------------------------- Waited ---------- ------------ SQL*Net message to client 2 0.00 0.00 SQL*Net message from client 2 10.31 10.31 ******************************************************************************** OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.00 0.00 0 0 0 0 Execute 1 0.00 0.00 0 0 0 0 Fetch 2 0.00 0.00 0 2 0 1 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 4 0.00 0.00 0 2 0 1 Misses in library cache during parse: 0 Elapsed times include waiting on following events: Event waited on Times Max. Wait Total Waited ---------------------------------------- Waited ---------- ------------ SQL*Net message to client 3 0.00 0.00 SQL*Net message from client 3 10.31 15.89 OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 0 0.00 0.00 0 0 0 0 Execute 0 0.00 0.00 0 0 0 0 Fetch 0 0.00 0.00 0 0 0 0 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 0 0.00 0.00 0 0 0 0 Misses in library cache during parse: 0 1 user SQL statements in session. 0 internal SQL statements in session. 1 SQL statements in session. ******************************************************************************** Trace file: /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_2761.trc Trace file compatibility: 11.1.0.7 Sort options: default 1 session in tracefile. 1 user SQL statements in trace file. 0 internal SQL statements in trace file. 1 SQL statements in trace file. 1 unique SQL statements in trace file. 62 lines in trace file. 0 elapsed seconds in trace file. SQL>
DBA不復制粘貼，你還能做些什麽？思考一下