使用pgbench对PostgreSQL进行基准测试

用户8196625

发布于 2023-09-06 15:33:05

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发布于 2023-09-06 15:33:05

文章被收录于专栏：oracleaceoracleace

TPC-C是经典的衡量在线事务处理（OLTP）系统性能和可伸缩性的基准测试规范。常见的开源数据库的基准测试工具有benchmarksql、 sysbench等，PostgreSQL自带运行基准测试的简单程序pgbench。pgbench是一个类TPC-B 的基准测试工具，可以执行内置的测试脚本，也可以自定义脚本文件。

官方文档：

PostgreSQL: Documentation: 15: pgbench

https://www.postgresql.org/docs/15/pgbench.html

使用pgbench --help可以查询pgbecnh的帮助信息。

—

初始化pgbench测试数据

使用下面的命令初始化测试数据

-bash-4.2$ pgbench -i -s 2 -F 80 -U postgres
dropping old tables...
NOTICE:  table "pgbench_accounts" does not exist, skipping
NOTICE:  table "pgbench_branches" does not exist, skipping
NOTICE:  table "pgbench_history" does not exist, skipping
NOTICE:  table "pgbench_tellers" does not exist, skipping
creating tables...
generating data (client-side)...
200000 of 200000 tuples (100%) done (elapsed 0.93 s, remaining 0.00 s)
vacuuming...
creating primary keys...
done in 1.69 s (drop tables 0.00 s, create tables 0.07 s, client-side generate 1.07 s, vacuum 0.19 s, primary keys 0.36 s).

—

使用内置脚本进行测试

pgbench 的内置测试脚本有tpcb-like、s simple-update 和 select-only 三种可以通过以下命令查看当前版本的p pgbench包含哪些集成的测试脚本：

-bash-4.2$ pgbench -b list
Available builtin scripts:
      tpcb-like: <builtin: TPC-B (sort of)>
  simple-update: <builtin: simple update>
    select-only: <builtin: select only>

下面的测试使用默认的tpcb-like方式进行10秒钟、10个客户端的测试：

-bash-4.2$ pgbench  -U postgres -T 10 -c 10
pgbench (14.3)
starting vacuum...end.
transaction type: <builtin: TPC-B (sort of)>
scaling factor: 2
query mode: simple
number of clients: 10
number of threads: 1
duration: 10 s
number of transactions actually processed: 4056
latency average = 24.613 ms
initial connection time = 50.735 ms
tps = 406.295741 (without initial connection time)

下面的测试使用默认的simple-update方式进行测试：

-bash-4.2$ pgbench -b simple-update -U postgres -T 10 -c 10
pgbench (14.3)
starting vacuum...end.
transaction type: <builtin: simple update>
scaling factor: 2
query mode: simple
number of clients: 10
number of threads: 1
duration: 10 s
number of transactions actually processed: 15846
latency average = 6.289 ms
initial connection time = 47.659 ms
tps = 1590.073191 (without initial connection time)

—

使用自定义脚本进行测试

创建一个表

CREATE TABLE tb1 (
    id SERIAL PRIMARY KEY,
    ncode INT
);

向表中插入数据的脚本

-bash-4.2$ cat Insert.sql
\set ncode random(1,900000)
INSERT INTO tb1 (ncode) VALUES (:ncode) ;

运行pgbench 使用该脚本进行测试:

-bash-4.2$ pgbench -f Insert.sql  -U postgres
pgbench (14.3)
starting vacuum...end.
transaction type: Insert.sql
scaling factor: 1
query mode: simple
number of clients: 1
number of threads: 1
number of transactions per client: 10
number of transactions actually processed: 10/10
latency average = 9.194 ms
initial connection time = 5.623 ms
tps = 108.761855 (without initial connection time)

检查一下插入的数据

postgres=# select * from tb1;
 id | ncode
----+--------
  1 | 247869
  2 | 595899
  3 | 285595
  4 | 179089
  5 | 408114
  6 | 507809
  7 | 453365
  8 | 231417
  9 | 306921
 10 | 533048
(10 rows)

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原始发表：2023-08-27，如有侵权请联系 cloudcommunity@tencent.com 删除

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