【文件属性】:
文件名称:-性能测试对比-pgbench-postgresql高可用对比
文件大小:6.49MB
文件格式:PPT
更新时间:2021-04-25 21:28:14
postgresql
04-性能测试对比-pgbench
通过pgbench在postgresql上运行做的基准测试。它能够并发的在数据库会话中一遍一遍的运行相同序列的SQL命令,并且计算平均事务率(每秒事务数tps)。Pgbench测试的一种基于TPC-B但是更宽松的场景。如下pgbench的模型
Branches
S*1
Tellers
S*10
Accounts
S*100000
History
S*0
Pgbench实际执行的事务
\set aid random(1, 100000 * :scale)
\set bid random(1, 1 * :scale)
\set tid random(1, 10 * :scale)
\set delta random(-5000, 5000)
BEGIN;
UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
END;
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