Re: win32 performance - fsync question - Mailing list pgsql-hackers

From Tom Lane
Subject Re: win32 performance - fsync question
Date
Msg-id 9957.1108668050@sss.pgh.pa.us
Whole thread Raw
In response to Re: win32 performance - fsync question  (Christopher Kings-Lynne <chriskl@familyhealth.com.au>)
Responses Re: win32 performance - fsync question  (Evgeny Rodichev <er@sai.msu.su>)
List pgsql-hackers
Christopher Kings-Lynne <chriskl@familyhealth.com.au> writes:
>> WinXP  fsync = true     20-28 tps
>> WinXP  fsync = false      600 tps
>> Linux  fsync = true       800 tps
>> Linux  fsync = false      980 tps

> Wow, that's terrible on Windows.  If there's a solution, it'd be nice to 
> backport it...

Actually, the number that's way out of line there is the Linux w/fsync
one.  I infer that he's got disk write cache enabled and therefore the
transactions aren't really being synced to disk at all.

Any claimed TPS rate exceeding your disk drive's rotation rate is a
red flag.
        regards, tom lane


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