On Tue, Aug 14, 2012 at 2:58 PM, Chris Hecker <[email protected]> wrote: > I just tested creation with randkey for the sake of completeness (I need > the passwords), and yeah, it looks like this: > > CPU > 11% slapd > 4% kadmind > > but, slapd is 97% DSK, so I guess it's the fsync's. It's basically the > same speed (10 ank/sec), which makes sense, since the previous test with > passwords wasn't 100% on the CPU, so it was disk bound as well on ldap. > > Deletes are also 10/sec.
Trace slapd to check how many fsync()s per-write it's doing. I suspect it's doing more than a single fsync() per-write operation -- assuming that you have a typical 7200rpm disk it must be doing quite a few fsync()s per-op! You might research alternative slapd backends and/or using SSDs. An enterprise-quality SSD (that can safely flush buffers to flash under power failure conditions) would probably net you a ~100x performance increase. Nico -- ________________________________________________ Kerberos mailing list [email protected] https://mailman.mit.edu/mailman/listinfo/kerberos
