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Re: [JunkMail] Re: Tuning cachesize
--On Thursday, February 07, 2008 10:43 AM -0800 Howard Chu <email@example.com>
Quanah Gibson-Mount wrote:
"threads": This directive sets the number of threads that slapd uses to
process requests. What this value should be I've generally found to be
a function of the number of "real" cores on the system. I.e., on a 2
CPU box with one core each, I set this to 8, or 4 threads per real core.
This is a "read" maximized value. The more threads that are configured
per core, the slower slapd responds for "read" operations. On the flip
side, it appears to handle write operations faster in a heavy write/low
The upper bound for good read performance appears to be 16 threads (which
also happens to be slapd's default). This is also the setting I used when
benchmarking the 8-core AMD and Intel servers; increasing beyond that
consumed more CPU time but didn't improve throughput.
Okay, so 8 or 16 threads then. Because I know that on my dual-CPU boxes,
16 was definitely less performant than 8 threads.
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