(1ROW) 由此可见,pg_table_size是pg_relation_size所有返回值的总和。 而pg_total_relation_size是pg_table_size和pg_indexes_size的总和。 如果您想知道表正在使用多少空间,请使用pg_table_size和pg_total_relation_size考虑它们-一个数字是仅表的,一个数字是表+索引的。 检查存储文件的布局,以获取有关fsm,v...
pool的缓存管理机制不同，Postgresql采用数据库采用实例buffer和操作系统buffer双缓存(effective_cache_size)...
A linear Vizing-like relation relating the size and total domination number of a graph (vol 49, pg 285, 2005)maximum degreeordersizetotal dominationThe proof of the main theorem in the paper [1] is incorrect as it is missing an important case. Here we complete the proof by giving the ...