Re: [PERFORM] shared-buffers set to 24GB but the RAM only use 4-5 GB average

2015-10-06 Thread Josh Berkus
On 10/06/2015 02:33 AM, FattahRozzaq wrote: > @Merlin Moncure, I got the calculation using pg_tune. And I modified > the shared_buffers=24GB and the effective_cache_size=64GB I really need to get Greg to take down pg_tune. It's way out of date. Probably, I should replace it. -- Josh Berkus Post

[PERFORM] Re: Multi processor server overloads occationally with system process while running postgresql-9.4

2015-10-06 Thread ajaykbs
I have checked the transparent huge pages and zone reclaim mode and those are already disabled. As a trial and error method, I have reduced the shared buffer size from 8500MB to 3000MB. The CPU i/o wait is icreased a little. But the periodical over load has not occurred afterwards. (3 days passed

Re: [PERFORM] shared-buffers set to 24GB but the RAM only use 4-5 GB average

2015-10-06 Thread Merlin Moncure
On Tue, Oct 6, 2015 at 10:10 AM, Scott Marlowe wrote: > On Tue, Oct 6, 2015 at 3:33 AM, FattahRozzaq wrote: >> @Merlin Moncure, I got the calculation using pg_tune. And I modified >> the shared_buffers=24GB and the effective_cache_size=64GB >> >> @Igor Neyman, >> Yes, I had performance problem wh

Re: [PERFORM] shared-buffers set to 24GB but the RAM only use 4-5 GB average

2015-10-06 Thread Scott Marlowe
On Tue, Oct 6, 2015 at 3:33 AM, FattahRozzaq wrote: > @Merlin Moncure, I got the calculation using pg_tune. And I modified > the shared_buffers=24GB and the effective_cache_size=64GB > > @Igor Neyman, > Yes, I had performance problem which sometimes the response time took > 11ms, with the exactly

Re: [PERFORM] One long transaction or multiple short transactions?

2015-10-06 Thread Igor Neyman
From: pgsql-performance-ow...@postgresql.org [mailto:pgsql-performance-ow...@postgresql.org] On Behalf Of Carlo Sent: Monday, October 05, 2015 11:11 PM To: pgsql-performance@postgresql.org Subject: [PERFORM] One long transaction or multiple short transactions? We have a system which is constant

Re: [PERFORM] shared-buffers set to 24GB but the RAM only use 4-5 GB average

2015-10-06 Thread FattahRozzaq
@Merlin Moncure, I got the calculation using pg_tune. And I modified the shared_buffers=24GB and the effective_cache_size=64GB @Igor Neyman, Yes, I had performance problem which sometimes the response time took 11ms, with the exactly same query it took 100ms, and the response time seems randomly f