Re: Abnormal performance difference between Postgres and MySQL

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

 



>>> Farhan Husain <russoue@xxxxxxxxx> wrote: 
> The machine postgres is running on has 4 GB of RAM.
 
In addition to the other suggestions, you should be sure that
effective_cache_size is set to a reasonable value, which would
probably be somewhere in the neighborhood of '3GB'.  This doesn't
affect actual RAM allocation, but gives the optimizer a rough idea how
much data is going to be kept in cache, between both the PostgreSQL
shared_memory setting and the OS cache.  It can make better choices
with more accurate information.
 
-Kevin

-- 
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

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

  Powered by Linux