这将返回一个包含表名和其相关选项的结果集,如果表中启用了压缩,则reloptions列将包含'compresslevel=整数'或'compresstype=字符串'等选项。 2、使用pg_stat_user_tables视图查询表的压缩统计信息: “`sql SELECT schemaname, relname, compressed_bytes, uncompressed_bytes FROM pg_stat_user_tables WHERE schemana...
## 序列相关1)查看序列select*frominformation_schema.sequenceswheresequence_schema='public';2)创建序列:createsequence seq_user_camera_version incrementby1minvalue1no maxvalue startwith1;3)建表,并用上面的序列作为主键自增序列CREATETABLEpublic.user_camera_version ( id int4NOTNULLDEFAULTnextval('seq_use...
select * from pg_stat_user_tables where n_live_tup > 100000 and seq_scan > 0 order by seq_tup_read desc limit 10; 9、查询读取buffer最多的5个SQL select * from pg_stat_statements order by shared_blks_hit+shared_blks_read desc limit 5; ...
在PostgreSQL 中,删除表的操作日志(也称为删除表的记录)不会被保存在单独的日志文件中。相反,删除表的操作会被记录在 PostgreSQL 的系统表中,例如 pg_catalog.pg_stat_activity、pg_catalog.pg_stat_user_tables、pg_catalog.pg_stat_all_tables 等系统表中。您可以通过查询这些系统表来查看有关删除表操作的相关...
)ASTONpt.tablename=T.TableNameWHEREpt.schemaname='public'ORDERBY1; --估算表中行业SELECTreltuples::bigintASEstimatedCountFROMpg_classWHEREoid='public.TableName'::regclass;--列出所有表中的行数SELECTschemaname ,relname ,n_live_tupASEstimatedCountFROMpg_stat_user_tablesORDERBYn_live_tupDESC;...
pg_stat_all_tables、pg_class、pg_tables、pg_indexes、pg_attribute 查看表大小 selectpt.schemaname||'.'||pt.tablename,pg_relation_filepath(pt.schemaname||'.'||pt.tablename), pg_table_size(pt.schemaname||'.'||pt.tablename), pg_relation_size(pt.schemaname||'.'||pt.tablename), ...
select * from pg_stat_user_tables where n_live_tup > 100000 and seq_scan > 0 order by seq_tup_read desc limit 10; 1. 3.2. 查询当前正在运行的访问到上述表的慢查询: select * from pg_stat_activity where query ilike '%%' and query_start - now() > interval '10 seconds'; 1. ...
pg_stat_all_tables视图中记录有analyze信息,比如何时做的analyze、表元组个数(活元组、死元组)等。重启后发现该视图中表的统计信息重置不见了,发生了什么? 1、pg_stat_all_tables 先理解下该视图,该视图定义如下。从视图定义可以看到相关统计信息都是通过一系列函数获取的: ...
from pg_stat_user_indexes where schemaname = 'public'order by pg_relation_size(indexrelname) desc;3. 查所有表的⼤⼩。select relname,pg_size_pretty(pg_relation_size(relname))from pg_stat_user_tables where schemaname = 'public'order by pg_relation_size(relname) desc;4. 查看单个表的⼤...
sudo gitlab-psql -c "SELECT relname, last_analyze, last_autoanalyze FROM pg_stat_user_tables WHERE last_analyze IS NULL AND last_autoanalyze IS NULL;" 执行上诉sql,如果有任何输出,则手动运行: sudo gitlab-psql -c 'SET statement_timeout = 0; ANALYZE VERBOSE;' ...