Re: Tuning Postgres 9.1 on Windows
От | Walker, James Les |
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Тема | Re: Tuning Postgres 9.1 on Windows |
Дата | |
Msg-id | 21BFB59709EBB84DB412ED7F739FFD3B1AC325@TBPINFN0203.cad.local обсуждение исходный текст |
Ответ на | Re: Tuning Postgres 9.1 on Windows (Merlin Moncure <mmoncure@gmail.com>) |
Ответы |
Re: Tuning Postgres 9.1 on Windows
(Merlin Moncure <mmoncure@gmail.com>)
|
Список | pgsql-performance |
SSD is OCZ-VERTEX3 MI. Controller is LSI SAS2 2008 Falcon. I'm working on installing EDB. Then I can give you some I/O numbers. -- Les -----Original Message----- From: Merlin Moncure [mailto:mmoncure@gmail.com] Sent: Tuesday, May 01, 2012 9:07 AM To: Walker, James Les Cc: Thomas Kellerer; pgsql-performance@postgresql.org Subject: Re: [PERFORM] Tuning Postgres 9.1 on Windows On Tue, May 1, 2012 at 7:51 AM, Walker, James Les <JAWalker@cantor.com> wrote: > Exactly, if turning off fsync gives me 100 commits/sec then I know where my bottleneck is and I can attack it. Keep inmind though that I already turned off synchronous commit -- *really* dangerous -- and it didn't have any effect. well synchronous commit is not as dangerous: fsync off + power failure = corrupt database synchronous commit off + power failure = some lost transactions still waiting on the ssd model #. worst case scenario is that you tps rate is in fact sync bound and you have a ssd withoutcapacitor backed buffers (for example, the intel 320 has them); the probable workaround would be to set the drivecache from write through to write back but it would unsafe in that case. in other words, tps rates in the triple digitswould be physically impossible. another less likely scenario is you are having network issues (assuming you are connecting to the database through tcp/ip). 20 years in, microsoft is still figuring out how to properly configure a network socket. merlin CONFIDENTIAL: This e-mail, including its contents and attachments, if any, are confidential. If you are not the named recipientplease notify the sender and immediately delete it. You may not disseminate, distribute, or forward this e-mailmessage or disclose its contents to anybody else. Copyright and any other intellectual property rights in its contentsare the sole property of Cantor Fitzgerald. E-mail transmission cannot be guaranteed to be secure or error-free. The sender therefore does not accept liabilityfor any errors or omissions in the contents of this message which arise as a result of e-mail transmission. Ifverification is required please request a hard-copy version. Although we routinely screen for viruses, addressees should check this e-mail and any attachments for viruses. We makeno representation or warranty as to the absence of viruses in this e-mail or any attachments. Please note that to ensureregulatory compliance and for the protection of our customers and business, we may monitor and read e-mails sent toand from our server(s). For further important information, please see http://www.cantor.com/legal/statement
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