DB=# SELECT n.nspname as "Schema",c.relname as "Name",pg_catalog.pg_get_userbyid(c.relowner) as "Owner" FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relkind ='r' AND n.nspname in('public',current_user) ORDER BY 2,1;...
postgres=#更新存储设置值=2000;更新1000000postgres=#SELECTrelnameAStable_name,pg_size_pretty(pg_total_relation_size(relid))AStotal_sizeFROMpg_catalog.pg_statio_user_tablesWHERErelname='store';table_name|total_size---+---store|142MB(1行) 正如预期的那样,由于更新语句之后每行都有 2 个元组(1 个...
pg_size_pretty(pg_total_relation_size(relid)) As "Size", pg_size_pretty(pg_total_relation_size(relid) - pg_relation_size(relid)) as "External Size" FROM pg_catalog.pg_statio_user_tables ORDER BY pg_total_relation_size(relid) DESC; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12...
mydb=# select pg_size_pretty(pg_relation_size('testfragement'));pg_size_pretty --- 0 bytes (1 row)# 查看表状态mydb=# \xExpanded display is on. mydb=# select * from pg_stat_user_tables where relname = 'testfragement';-[ RECORD 1 ]---+--- relid | 16773 schemaname | public ...
developer用户的密码存储于环境变量PGPASSWORD中。 31.查询表是否存在 select * from pg_statio_user_tables where relname='你的表名'; 32.为用户复制SCHEMA权限 grant all on SCHEMA 作用域名称 to 用户名称 33.整个数据库导出 pg_dumpall -D -p 端口号 -h 服务器IP -U postgres(用户名) > /home/xiao...
track_io_timing还将开始收集多个视图的统计信息,包括pg_stat_database、pg_stat_all_tables、pg_stat_user_tables。此数据显示块读取(使用的 I/O)和块命中(数据已位于共享缓冲区中)。数据持续更新,通常会找与块命中相比读取块非常高的用户表。 代码语言:javascript ...
pg_statio_user_tables; We can see in thisdataclipthat the cache rate forHeroku Postgresis 99.99%. If you find yourself with a ratio significantly lower than 99% then you likely want to consider increasing the cache available to your database, you can do this on Heroku Postgres byperforming...
(heap_blks_read+heap_blks_hit+idx_blks_read+idx_blks_hit+coalesce(toast_blks_read+toast_blks_hit+tidx_blks_read+tidx_blks_hit,0)) END AS hit_ratio FROM pg_statio_all_tables ORDER BY coalesce(heap_blks_read+heap_blks_hit+idx_blks_read+idx_blks_hit, heap_blks_read+heap_blks_hit,...
SELECT sum(heap_blks_read) as heap_read, sum(heap_blks_hit) as heap_hit, sum(heap_blks_hit) / (sum(heap_blks_hit) + sum(heap_blks_read)) as ratio FROM pg_statio_user_tables; Note: For warehouse or analytical workloads, you will probably have a much lower cache hit ratio. 3....
问如何访问Amundsen的Postgres数据库EN1.先切换用户 [root@anode1 ~]# su postgres bash-4.2$ 2.用...