sql 获取特定表的IO统计信息

Posted 2021-05-13

select relname         as "table",
       heap_blks_read  as "heap from disc",
       heap_blks_hit   as "heap from cache",
       idx_blks_read   as "index from disc",
       idx_blks_hit    as "index from cache",
       toast_blks_read as "toast from disc",
       toast_blks_hit  as "toast from cache",
       tidx_blks_read  as "toast index disc",
       tidx_blks_hit   as "toast index cache"
  from pg_statio_user_tables
 where relname = 'TABLE_NAME';