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...
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...
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...
有些情况下需要将下一次要分配的内存块的大小置为上一次的2倍,所以nextBlockSize是会变大的。当对内存上下文进行重置时,需要将nextBlockSize恢复到初始值,也就是initBlockSize,所以initBlockSize充当了内存块初始大小的备份值。虽然nextBlockSize可以增大,但也并不能无限制地增加,maxBlockSize字段指定了内存块可以到达...
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...
Size (*get_chunk_space) (MemoryContext context, void *pointer); bool (*is_empty) (MemoryContext context); void (*stats) (MemoryContext context, MemoryStatsPrintFunc printfunc, void *passthru, MemoryContextCounters *totals); #ifdef MEMORY_CONTEXT_CHECKING void (*check) (MemoryContext context)...
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...
3、effective_cache_size 50%-75% of total memory This is a guideline for how much memory you expect to be available in the OS and PostgreSQL buffer caches, not an allocation! 这个参数只在查询优化器选择时使用、并不是实际分配的内存、该参数越大、查询优化器越倾向于选择索引扫描。