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Re: Direct I/O issues
- From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
- To: Greg Smith <gsmith(at)gregsmith(dot)com>
- Cc: pgsql-performance(at)postgresql(dot)org
- Subject: Re: Direct I/O issues
- Date: Thu, 23 Nov 2006 11:45:42 -0500
Greg Smith <gsmith(at)gregsmith(dot)com> writes: > The results I get now look fishy. There are at least two things wrong with this program: * It does not respect the alignment requirement for O_DIRECT buffers (reportedly either 512 or 4096 bytes depending on filesystem). * It does not check for errors (if it had, you might have realized the other problem). regards, tom lane
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