--数据库中单个表的大小(不包含索引) select pg_size_pretty(pg_relation_size('表名')); --查出所有表(包含索引)并排序 SELECT table_schema || '.' || table_name AS table_
playboy=>selectpg_size_pretty(pg_tablespace_size('pg_default'));//查看表空间大小 pg_size_pretty---14MB (1row) 6 统计数据库中各表占用磁盘大小: SELECTtable_schema||'.'||table_nameAStable_full_name, pg_size_pretty(pg_total_relation_size('"'||table_schema||'"."'||table_name||'"'...
In PostgreSQL, built-in functions like pg_database_size(), and pg_relation_size() are used to get the database and table size respectively. The pg_size_pretty() function can be used with the collaboration of the pg_database_size(), pg_relation_size() to present the database/table si...
postgres=# \d+ example_tbl Table "public.example_tbl"Column | Type | Collation | Nullable | Default | Storage | Compression | Stats target | Description---+---+---+---+---+---+---+---+---id | integer | | not null | | plain | ...
postgres=# create tablespace myspc location '/home/postgres/mytablespace'; CREATE TABLESPACE postgres=# create table test(id int,info text); CREATE TABLE postgres=# insert into test select n,md5(random()::text) from generate_series(1,10) as n; INSERT 0 10 postgres=# select pg_size_prett...
3、调用get_table_am_oid根据表访问方法名获取对应的oid,即pg_am的oid字段: 1)先从SysCache[AMNAME]hash表中检索,即pg_am_name_index的缓存 1)否则顺序扫描pg_am表 4、调用函数heap_create_with_catalog进行初始化表访问方法、创建磁盘物理文件、向pg_class系统表插入一条元数据tuple: ...
select pg_relation_size(); select pg_table_size(); select pg_total_relation_size(); 物理、逻辑复制槽: pg_create/drop_physical_replication_slot(slotname); pg_create_logical_replication_slot(slotname,decodingname); pg_logical_slot_get_changes();...
select pg_size_pretty(pg_tablespace_size('pg_default')); select pg_size_pretty(pg_relation_size('account_move_line')); select sum(t.size) from ( SELECT table_schema || '.' || table_name AS table_full_name, pg_total_relation_size('"' || table_schema || '"."' || table_name...
(MemoryContext context,void*pointer,Size size);//重分配内存void(*init)(MemoryContext context);//初始化内存上下文void(*reset)(MemoryContext context);//重置内存上下文void(*delete)(MemoryContext context);//删除内存上下文Size(*get_chunk_space)(MemoryContext context,void*pointer);//检查内存片段的大小...