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：2024-05-15 15:14:54
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; *