本篇内容主要讲解“怎么使用PostgreSQL的配置参数checkpoint_flush_after”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“怎么使用PostgreSQL的配置参数checkpoint_flush_after”吧!
在CentOS 7.x下使用sysbench测试,尝试0/256kB/2MB,只有可以忽略不计的细微区别.
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checkpoint_flush_after = 2MB
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SQL statistics:
queries performed:
read: 107367
write: 111268
other: 16840
total: 235475
transactions: 8419 (84.16 per sec.)
queries: 235475 (2353.96 per sec.)
ignored errors: 43 (0.43 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 84.1616
time elapsed: 100.0337s
total number of events: 8419
Latency (ms):
min: 2.56
avg: 23.76
max: 311.66
95th percentile: 62.19
sum: 200002.13
Threads fairness:
events (avg/stddev): 4209.5000/48.50
execution time (avg/stddev): 100.0011/0.00
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checkpoint_flush_after = 256kB
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SQL statistics:
queries performed:
read: 110021
write: 114168
other: 17072
total: 241261
transactions: 8535 (85.31 per sec.)
queries: 241261 (2411.50 per sec.)
ignored errors: 29 (0.29 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 85.3106
time elapsed: 100.0462s
total number of events: 8535
Latency (ms):
min: 2.62
avg: 23.43
max: 260.37
95th percentile: 61.08
sum: 200017.57
Threads fairness:
events (avg/stddev): 4267.5000/37.50
execution time (avg/stddev): 100.0088/0.02
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checkpoint_flush_after = 0
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SQL statistics:
queries performed:
read: 111431
write: 115279
other: 17380
total: 244090
transactions: 8689 (86.86 per sec.)
queries: 244090 (2440.19 per sec.)
ignored errors: 42 (0.42 per sec.)
reconnects: 0 (0.00 per sec.)
Throughput:
events/s (eps): 86.8646
time elapsed: 100.0293s
total number of events: 8689
Latency (ms):
min: 2.60
avg: 23.02
max: 213.39
95th percentile: 59.99
sum: 199980.96
Threads fairness:
events (avg/stddev): 4344.5000/16.50
execution time (avg/stddev): 99.9905/0.00到此，相信大家对“怎么使用PostgreSQL的配置参数checkpoint_flush_after”有了更深的了解，不妨来实际操作一番吧！这里是亿速云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
