Thread: pl/pgsql performance
Hi All
I have one big Pl/Pgsql function (about 1500 line code) , i can divided it to about 5 part and call each script from main script . In this case i need to know which way is faster .
and some question about pgsql :
1- is pgsql engine open one process for each script ?
2- how i can chose max connection number for pgsql server based on cpu core and RAM capacity that have maximum Efficiency?
Thanks and Best ergards.
Hello
2014-04-25 10:48 GMT+02:00 Mehdi Ravanbakhsh <babakco@gmail.com>:
Hi AllI have one big Pl/Pgsql function (about 1500 line code) , i can divided it to about 5 part and call each script from main script . In this case i need to know which way is faster .and some question about pgsql :1- is pgsql engine open one process for each script ?
PostgreSQL uses one CPU per session.
2- how i can chose max connection number for pgsql server based on cpu core and RAM capacity that have maximum Efficiency?
usually max performance is about 10 x CPU connections. But it highly depends on load.
Regards
Pavel Stehule
Pavel Stehule
Thanks and Best ergards.
On Fri, Apr 25, 2014 at 5:53 PM, Pavel Stehule <pavel.stehule@gmail.com> wrote: > 2014-04-25 10:48 GMT+02:00 Mehdi Ravanbakhsh <babakco@gmail.com>: >> 2- how i can chose max connection number for pgsql server based on cpu >> core and RAM capacity that have maximum Efficiency? > usually max performance is about 10 x CPU connections. But it highly depends > on load. As well as transaction model counts, are you for example using long or short transactions? As a starting point, you could as well use something like ((core_count * 2) + effective_spindle_count). have a look here for more details: http://wiki.postgresql.org/wiki/Number_Of_Database_Connections#How_to_Find_the_Optimal_Database_Connection_Pool_Size -- Michael