pgbench基准测试《postgresql》

pgbench是一种在PostgreSQL上运行基准测试的简单程序。它可能在并发的数据库会话中一遍一遍地运行相同序列的 SQL 命令，并且计算平均事务率（每秒的事务数）。默认情况下，pgbench会测试一种基于 TPC-B 但是要更宽松的场景，其中在每个事务中涉及五个SELECT、UPDATE以及INSERT命令。但是，通过编写自己的事务脚本文件很容易用来测试其他情况。

1.修改pg_hba.conf

host  all    all    10.6.8.0/24    trust

systemctl status postgresql-13

2.测试

2.1初始化

[[email protected] data]# /usr/pgsql-13/bin/pgbench  -i --unlogged-tables -s 2 -U user001 -p 5432 -d db001 -h 10.6.8.238
dropping old tables...
creating tables...
generating data (client-side)...
200000 of 200000 tuples (100%) done (elapsed 0.07 s, remaining 0.00 s)
vacuuming...
creating primary keys...
done in 0.57 s (drop tables 0.03 s, create tables 0.03 s, client-side generate 0.24 s, vacuum 0.14 s, primary keys 0.12 s).

2.2 执行压力测试

-M prepared表示绑定变量形式的调用SQL，-r表示报告测试文件中每条SQL的平均执行延迟，
-c 8表示模拟8个客户端，-j 2表示pgbench的工作线程是2个，
-T 10表示压力测试的时间是10秒，-l表示把事务统计写入log，其余的是postgres连接相关的参数
以上参数，也可以结合命令帮助看出来

/usr/pgsql-13/bin/pgbench -M prepared -r -c 8 -j 2 -T 10 -U user001 -h 10.6.8.238 -p 5432 -d db001 -l

执行结果

transaction type: <builtin: TPC-B (sort of)>
scaling factor: 2
query mode: prepared
number of clients: 8
number of threads: 2
duration: 10 s
number of transactions actually processed: 10945
latency average = 7.721 ms
tps = 1036.127306 (including connections establishing)
tps = 1036.693062 (excluding connections establishing)
statement latencies in milliseconds:
         0.017  \set aid random(1, 100000 * :scale)
         0.015  \set bid random(1, 1 * :scale)
         0.014  \set tid random(1, 10 * :scale)
         0.013  \set delta random(-5000, 5000)
         0.572  BEGIN;
         0.640  UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
         0.649  SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
         1.214  UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
         3.341  UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
         0.636  INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
         0.411  END;