Re: further testing on IDE drives
От | Vivek Khera |
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Тема | Re: further testing on IDE drives |
Дата | |
Msg-id | x7smm0om2l.fsf@yertle.int.kciLink.com обсуждение исходный текст |
Ответ на | Re: further testing on IDE drives (Bruce Momjian <pgman@candle.pha.pa.us>) |
Ответы |
Re: further testing on IDE drives
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Список | pgsql-performance |
>>>>> "BM" == Bruce Momjian <pgman@candle.pha.pa.us> writes: >> Sounds reasonable to me. Are there many / any scenarios where a plain >> fsync would be faster than open_sync? BM> Yes. If you were doing multiple WAL writes before transaction fsync, BM> you would be fsyncing every write, rather than doing two writes and BM> fsync'ing them both. I wonder if larger transactions would find BM> open_sync slower? consider loading a large database from a backup dump. one big transaction during the COPY. I don't know the implications it has on this scenario, though. -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Vivek Khera, Ph.D. Khera Communications, Inc. Internet: khera@kciLink.com Rockville, MD +1-240-453-8497 AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/
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