def check_index_size(): conn = None conn = psycopg2.connect(database="postgres",user="admin",password="admin",host="192.168.198.100",port="5432") table_list = ["pgbench_accounts","pgbench_branches","pgbench_history","pgbench_tellers"] cur = conn.cursor() for table in table_list: z1...
def check_table_size(): conn = None conn = psycopg2.connect(database="postgres",user="admin",password="admin",host="192.168.198.100",port="5432") table_list = ["pgbench_accounts","pgbench_branches","pgbench_history","pgbench_tellers"] cur = conn.cursor() for table in table_list: z1...
How to Check Database Size or Table Size in Postgres Using pgAdmin? In Postgres, different built-in functions are used to check the size of database objects, such as thepg_relation_size(),pg_database_size(),pg_size_pretty(), etc. However, pgAdmin helps us get the size of database o...
end ) as idx_tablesapce_name, round(pg_relation_size(ti.idxoid)/1024/1024.0,2) as idx_size_mb, ti.relpages as idx_pages, ti.reltuples as idx_tuples, ti.relhasindex as idx_hasindex from tmp_table tt left outer join tmp_index ti on tt.taboid=ti.taboid where 1=1 order by t...
PostgreSQL中的每个索引和表都是一个单独的文件,称为Segment。默认是每个大于1G的Segment会被分割pg_class.efilenode.1这样的文件。Segment的大小可以在initdb时通过选项--with-segsize=SEGSIZE指定 注意:truncate表之后relfilenode会变。对应的物理文件名字也会变。
check_collation_set(collid); if (lc_collate_is_c(collid) || collid == DEFAULT_COLLATION_OID || pg_newlocale_from_collation(collid)->deterministic) { Datum arg1 = PG_GETARG_DATUM(0); Datum arg2 = PG_GETARG_DATUM(1); Size len1, ...
PostgreSQL 9.5 以及更高版本,pg_wal(pg_xlog)目录中 WAL 段文件总大小超过参数 max_wal_size 的配置,默认值为 1 GB。 PostgreSQL 数据库服务以 smart(SIGTERM)或者 fast(SIGINT)模式关闭。 超级用户或者 pg_checkpoint 特权用户手动执行 CHECKPOINT 命令。 检查点机制可以将内存中的脏数据刷新到磁盘,并且生成一个...
轮询替换 log_filename = 'postgresql.%a' #日志名称 log_file_mode = 0600 # 只有postgres有读写权限 log_truncate_on_rotation = on # 覆盖同名日志 log_rotation_size = 0 # 不限制日志大小 log_min_messages = warning # 控制哪些消息级别被写入到审计日志 log_min_error_statement = error # 控制...
postgres=#createtablespacemyspclocation'/home/postgres/mytablespace';CREATETABLESPACEpostgres=#createtabletest(idint,infotext);CREATETABLEpostgres=#insertintotestselectn,md5(random()::text)fromgenerate_series(1,10)asn;INSERT010postgres=#selectpg_size_pretty(pg_tablespace_size('myspc'));pg_size_pretty...
model(tablename, schema = null) 返回Model实例去执行SQL。 transaction(callback, schema) 事务执行,其内部是调用了Model实例的transaction。 复杂查询 letpqorm = initORM(dbconfig); ;(async() =>{letcond = {is_delete:0,nickname: {'ILIKE':'%ae%'} ...