pgsql代码分析

PgSQL·代码浅析·PostgreSQL 可靠性分析

pg_ctl stop-m immediate 记录接下来要纂改的REDO文件以及之前的文件最后的内容纂改的前一个文件的末尾的一些内容，用于判断已持久化的记录能看到几笔commit rec就行了 pg_xlogdump-b 0000000100000116000000F7 0000000100000116000000F7...

PgSQL·代码浅析·PostgreSQL 9.6 聚合OP复用的优化分析

accum {0,0,0} 2 5 pg_catalog.stddev_samp float4_accum {0,0,0} 2 6 pg_catalog.var_pop float4_accum {0,0,0} 2 7 pg_catalog.stddev_pop float4_accum {0,0,0} 9 1 pg_catalog.max float4larger none 10 1 pg_catalog.min float4...

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