PostgreSQL資料庫壓力測試工具pgbench簡單應用
阿新 • • 發佈：2019-02-17
PG資料庫提供了一款輕量級的壓力測試工具叫pgbench,其實就是一個編譯好後的擴充套件性的可執行檔案。介紹如下。
環境：
CentOS 5.7(final)
PG:9.1.2
Vmware 8.0
資料庫引數： max_connection=100 ,其他略，預設
1.安裝
進入原始碼安裝包,編譯,安裝
a.這裡使用的是預設的引數值,帶-s 引數時可指定測試資料的資料量,-f可以指定測試的指令碼,這裡用的是預設指令碼
b.不要在生產的庫上做，新建一個測試庫，當生產上有同名的測試表時將被重置
超過100個會報錯，因為資料庫當前設定最大session是100
我們主要關心的是最後的輸出報告中的TPS值，裡面有兩個,一個是包含網路開銷(including),另一個是不包含網路開銷的(excluding),這個值是反映的每秒處理的事務數，反過來也可以查出每個事務數所消耗的平均時間，一般認為能將硬體用到極致，速度越快越好。
環境：
CentOS 5.7(final)
PG:9.1.2
Vmware 8.0
資料庫引數： max_connection=100 ,其他略，預設
1.安裝
進入原始碼安裝包,編譯,安裝
[postgres@localhost ~]$ cd postgresql-9.1.2/contrib/pgbench/ [postgres@localhost pgbench]$ ll total 164 -rw-r--r--. 1 postgres postgres 538 Dec 1 2011 Makefile -rwxrwxr-x. 1 postgres postgres 50203 Apr 26 23:50 pgbench -rw-r--r--. 1 postgres postgres 61154 Dec 1 2011 pgbench.c -rw-rw-r--. 1 postgres postgres 47920 Apr 26 23:50 pgbench.o [postgres安裝完畢以後可以在bin資料夾下看到新生成的pgbench檔案@localhost pgbench]$make all [postgres@localhost pgbench]$make install
[postgres@localhost bin]$ ll $PGHOME/bin pgbench -rwxr-xr-x. 1 postgres postgres 50203 Jul 8 20:28 pgbench2.引數介紹
[postgres@localhost bin]$ pgbench --help pgbench is a benchmarking tool for PostgreSQL. Usage: pgbench [OPTIONS]... [DBNAME] Initialization options: -i invokes initialization mode -F NUM fill factor -s NUM scaling factor Benchmarking options: -c NUM number of concurrent database clients (default: 1) -C establish new connection for each transaction -D VARNAME=VALUE define variable for use by custom script -f FILENAME read transaction script from FILENAME -j NUM number of threads (default: 1) -l write transaction times to log file -M {simple|extended|prepared} protocol for submitting queries to server (default: simple) -n do not run VACUUM before tests -N do not update tables "pgbench_tellers" and "pgbench_branches" -r report average latency per command -s NUM report this scale factor in output -S perform SELECT-only transactions -t NUM number of transactions each client runs (default: 10) -T NUM duration of benchmark test in seconds -v vacuum all four standard tables before tests Common options: -d print debugging output -h HOSTNAME database server host or socket directory -p PORT database server port number -U USERNAME connect as specified database user --help show this help, then exit --version output version information, then exit Report bugs to .
[postgres@localhost ~]$ pgbench -i pgbench creating tables... 10000 tuples done. 20000 tuples done. 30000 tuples done. 40000 tuples done. 50000 tuples done. 60000 tuples done. 70000 tuples done. 80000 tuples done. 90000 tuples done. 100000 tuples done. set primary key... NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "pgbench_branches_pkey" for table "pgbench_branches" NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "pgbench_tellers_pkey" for table "pgbench_tellers" NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "pgbench_accounts_pkey" for table "pgbench_accounts" vacuum...done. [postgres說明：@localhost ~]$ psql -d pgbench psql (9.1.2) Type "help" for help. pgbench=# select count(1) from pgbench_accounts; count -------- 100000 (1 row) pgbench=# select count(1) from pgbench_branches; count ------- 1 (1 row) pgbench=# select count(1) from pgbench_history; count ------- 0 (1 row) pgbench=# select count(1) from pgbench_tellers; count ------- 10 (1 row) pgbench=# \d+ pgbench_accounts Table "public.pgbench_accounts" Column | Type | Modifiers | Storage | Description ----------+---------------+-----------+----------+------------- aid | integer | not null | plain | bid | integer | | plain | abalance | integer | | plain | filler | character(84) | | extended | Indexes: "pgbench_accounts_pkey" PRIMARY KEY, btree (aid) Has OIDs: no Options: fillfactor=100 pgbench=# \d+ pgbench_branches Table "public.pgbench_branches" Column | Type | Modifiers | Storage | Description ----------+---------------+-----------+----------+------------- bid | integer | not null | plain | bbalance | integer | | plain | filler | character(88) | | extended | Indexes: "pgbench_branches_pkey" PRIMARY KEY, btree (bid) Has OIDs: no Options: fillfactor=100 pgbench=# \d+ pgbench_history Table "public.pgbench_history" Column | Type | Modifiers | Storage | Description --------+-----------------------------+-----------+----------+------------- tid | integer | | plain | bid | integer | | plain | aid | integer | | plain | delta | integer | | plain | mtime | timestamp without time zone | | plain | filler | character(22) | | extended | Has OIDs: no pgbench=# \d+ pgbench_tellers Table "public.pgbench_tellers" Column | Type | Modifiers | Storage | Description ----------+---------------+-----------+----------+------------- tid | integer | not null | plain | bid | integer | | plain | tbalance | integer | | plain | filler | character(84) | | extended | Indexes: "pgbench_tellers_pkey" PRIMARY KEY, btree (tid) Has OIDs: no Options: fillfactor=100
a.這裡使用的是預設的引數值,帶-s 引數時可指定測試資料的資料量,-f可以指定測試的指令碼,這裡用的是預設指令碼
b.不要在生產的庫上做，新建一個測試庫，當生產上有同名的測試表時將被重置
4.測試過程
4.1 1個session
[postgres@localhost ~]$ nohup pgbench -c 1 -T 20 -r pgbench > file.out 2>&1 [postgres@localhost ~]$ more file.out nohup: ignoring input starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 query mode: simple number of clients: 1 number of threads: 1 duration: 20 s number of transactions actually processed: 12496 tps = 624.747958 (including connections establishing) tps = 625.375564 (excluding connections establishing) statement latencies in milliseconds: 0.005299 \set nbranches 1 * :scale 0.000619 \set ntellers 10 * :scale 0.000492 \set naccounts 100000 * :scale 0.000700 \setrandom aid 1 :naccounts 0.000400 \setrandom bid 1 :nbranches 0.000453 \setrandom tid 1 :ntellers 0.000430 \setrandom delta -5000 5000 0.050707 BEGIN; 0.200909 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid; 0.098718 SELECT abalance FROM pgbench_accounts WHERE aid = :aid; 0.111621 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid; 0.107297 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid; 0.095156 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP); 0.919101 END;4.2 30個session
[postgres@localhost ~]$nohup pgbench -c 30 -T 20 -r pgbench > file.out 2>&1 [postgres@localhost ~]$ more file.out nohup: ignoring input starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 query mode: simple number of clients: 30 number of threads: 1 duration: 20 s number of transactions actually processed: 8056 tps = 399.847446 (including connections establishing) tps = 404.089024 (excluding connections establishing) statement latencies in milliseconds: 0.004195 \set nbranches 1 * :scale 0.000685 \set ntellers 10 * :scale 0.000887 \set naccounts 100000 * :scale 0.000805 \setrandom aid 1 :naccounts 0.000656 \setrandom bid 1 :nbranches 0.000523 \setrandom tid 1 :ntellers 0.000499 \setrandom delta -5000 5000 0.515565 BEGIN; 0.865217 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid; 0.307207 SELECT abalance FROM pgbench_accounts WHERE aid = :aid; 50.543371 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid; 19.210089 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid; 0.384190 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP); 2.116383 END;4.3 50個session
[postgres@localhost ~]$nohup pgbench -c 50 -T 20 -r pgbench > file.out 2>&1 [postgres@localhost ~]$ more file.out nohup: ignoring input starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 query mode: simple number of clients: 50 number of threads: 1 duration: 20 s number of transactions actually processed: 7504 tps = 370.510431(including connections establishing) tps = 377.964565(excluding connections establishing) statement latencies in milliseconds: 0.004291 \set nbranches 1 * :scale 0.000769 \set ntellers 10 * :scale 0.000955 \set naccounts 100000 * :scale 0.000865 \setrandom aid 1 :naccounts 0.000513 \setrandom bid 1 :nbranches 0.000580 \setrandom tid 1 :ntellers 0.000522 \setrandom delta -5000 5000 0.604671 BEGIN; 1.480723 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid; 0.401148 SELECT abalance FROM pgbench_accounts WHERE aid = :aid; 104.713566 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid; 21.562787 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid; 0.412209 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP); 2.243497 END;4.4 100個session
超過100個會報錯，因為資料庫當前設定最大session是100
[postgres@localhost ~]$ nohup pgbench -c 100 -T 20 -r pgbench> file.out 2>&1 [postgres@localhost ~]$ more file.out nohup: ignoring input starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 query mode: simple number of clients: 100 number of threads: 1 duration: 20 s number of transactions actually processed: 6032 tps = 292.556692 (including connections establishing) tps = 305.595090 (excluding connections establishing) statement latencies in milliseconds: 0.004508 \set nbranches 1 * :scale 0.000787 \set ntellers 10 * :scale 0.000879 \set naccounts 100000 * :scale 0.001620 \setrandom aid 1 :naccounts 0.000485 \setrandom bid 1 :nbranches 0.000561 \setrandom tid 1 :ntellers 0.000656 \setrandom delta -5000 5000 3.660809 BEGIN; 4.198062 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid; 1.727076 SELECT abalance FROM pgbench_accounts WHERE aid = :aid; 281.955832 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid; 27.054125 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid; 0.524155 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP); 2.710619 END;5.說明
我們主要關心的是最後的輸出報告中的TPS值，裡面有兩個,一個是包含網路開銷(including),另一個是不包含網路開銷的(excluding),這個值是反映的每秒處理的事務數，反過來也可以查出每個事務數所消耗的平均時間，一般認為能將硬體用到極致，速度越快越好。