Re: Less rows -> better performance?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[...]
You can check this too:
select relname, relpages, reltuples, relkind
 from pg_class
where relkind in ('r', 'i')
order by relpages desc limit 20;

Will give you the top-20 tables and their sizes, 1 page is typically 8KB, so you can cross-check if relpages/reltuples is completly off, this is a good indicator for table/index bloat.
use this query :
select pg_size_pretty(pg_relation_size(oid)) as relation_size,relname, relpages, reltuples, relkind
from pg_class
where relkind in ('r', 'i')
order by relpages desc limit 20;

output will be much more readeable

Regards,
Mario
   Lukasz

--
Lukasz Filut
DBA - IT Group, WSB-TEB Corporation
Poznan - Poland



[Postgresql General]     [Postgresql PHP]     [PHP Users]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Yosemite]

  Powered by Linux