Re: Insert are going slower ...

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От
Shridhar Daithankar
Тема
Re: Insert are going slower ...
Дата
Msg-id
40F5440F.7080202@frodo.hserus.net
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Insert are going slower ... Hervé Piedvache <herve@elma.fr>
Re: Insert are going slower ... Josh Berkus <josh@agliodbs.com>
Re: Insert are going slower ... Hervé Piedvache <footcow@noos.fr>
Re: Insert are going slower ... Josh Berkus <josh@agliodbs.com>
Re: Insert are going slower ... Hervé Piedvache <footcow@noos.fr>
Re: Insert are going slower ... Hervé Piedvache <footcow@noos.fr>
Re: Insert are going slower ... Shridhar Daithankar <shridhar@frodo.hserus.net>
Re: Insert are going slower ... Josh Berkus <josh@agliodbs.com>
Re: Insert are going slower ... Hervé Piedvache <herve@elma.fr>
Re: Insert are going slower ... Josh Berkus <josh@agliodbs.com>
Re: Insert are going slower ... Gaetano Mendola <mendola@bigfoot.com>
Re: Insert are going slower ... Gaetano Mendola <mendola@bigfoot.com>
Re: Insert are going slower ... "Scott Marlowe" <smarlowe@qwest.net>
Hervé Piedvache wrote:
> In my case it's a PostgreSQL dedicated server ...
> 
> effective_cache_size = 5000000 
> 
> For me I give to the planner the information that the kernel is able to cache 
> 5000000 disk page in RAM

That is what? 38GB of RAM?
> 
> 
>>free
> 
>              total       used       free     shared    buffers     cached
> Mem:       7959120    7712164     246956          0      17372    7165704
> -/+ buffers/cache:     529088    7430032
> Swap:      2097136       9880    2087256
> 
> What should I put ?

7165704 / 8 = 895713

So counting variations, I would say 875000. That is a 8GB box, right? So 875000 
is about 7000MB. Which should be rather practical. Of course you can give it 
everything you can but that's upto you.

Can you get explain analze for inserts? I think some foreign key check etc. are 
taking long and hence it accumulates. But that is just a wild guess.

Off the top of my head, you have allocated roughly 48K shard buffers which seems 
bit on higher side. Can you check with something like 10K-15K?

HTH

  Shridhar
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