Direct I/O - Mailing list pgsql-performance

From lai yoke hman
Subject Direct I/O
Date
Msg-id BAY126-W47B86724087E7C49F49E74A9010@phx.gbl
Whole thread Raw
Responses Re: Direct I/O
Re: Direct I/O
List pgsql-performance
Hello,
How can I know my PostgreSQL 8 is using direct I/O or buffered I/O? If using buffered I/O, how can I enable direct I/O?
Whatis the performance difference of them? 
This is urgent, Thanks.
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