Re: Poor performance on Solaris

[Jorgen Lundman <lundman@lundman.net>]

The DB_CONFIG values are in slapd.conf, and to make slapd re-write/update them, 
you delete the file before starting slapd.


Brett Maxfield wrote:
> Why delete DB_CONFIG, surely that would make performance worse, apart from the fact you now compare apples and oranges.. ?
>
> On 01/03/2011, at 12:41 PM, Jorgen Lundman<lundman@lundman.net>  wrote:
>
> > Howard Chu wrote:
> > > Actually, you should always use a shared memory key on Solaris. Using
> > > mmap'd files is just too slow on that OS.
> >
> > SunOS dns05.unix 5.10 Generic_141445-09 i86pc i386 i86pc
> >
> > Is this still the case? I did a quick (naive?) test to see if it would improve things for our LDAP server. I had an old/replace DNS server to test on, using production values.
> >
> > # wc -l p
> >   142149 p
> > # time /usr/local/bin/ldapsearch -h 0 -x -D 'cn=admin,dc=company,dc=com' -w secret -f p -b ou=dns,dc=company,dc=com "(%s)" dn>  /dev/null
> >
> > pass 1
> > real    0m20.660s
> > user    0m3.134s
> > sys     0m1.283s
> >
> > pass 2
> > real    0m20.853s
> > user    0m3.132s
> > sys     0m1.309s
> >
> >
> > I added only:
> >
> > + shm_key 1000
> > + dbconfig set_shm_key 1000
> >
> > to slapd.conf, deleted DB_CONFIG, stopped slapd, ran db_recover, started slapd:
> >
> > # ipcs
> > IPC status from<running system>  as of Tuesday, March  1, 2011 11:32:05 AM JST
> > T         ID      KEY        MODE        OWNER    GROUP
> > Message Queues:
> > Shared Memory:
> > m         23   0x3ed      --rw-------     root     root
> > m         22   0x3ec      --rw-------     root     root
> > m         21   0x3eb      --rw-------     root     root
> > m         20   0x3ea      --rw-------     root     root
> > m         19   0x3e9      --rw-------     root     root
> > m         18   0x3e8      --rw-------     root     root
> >
> >
> > pass 1
> > real    0m19.772s
> > user    0m3.109s
> > sys     0m1.275s
> >
> > pass 2
> > real    0m19.858s
> > user    0m3.102s
> > sys     0m1.275s
> >
> >
> > I was hoping for a larger difference, but maybe my tests are a little too simple.
> >
> >
> > --
> > Jorgen Lundman       |<lundman@lundman.net>
> > Unix Administrator   | +81 (0)3 -5456-2687 ext 1017 (work)
> > Shibuya-ku, Tokyo    | +81 (0)90-5578-8500          (cell)
> > Japan                | +81 (0)3 -3375-1767          (home)

--
Jorgen Lundman       | <lundman@lundman.net>
Unix Administrator   | +81 (0)3 -5456-2687 ext 1017 (work)
Shibuya-ku, Tokyo    | +81 (0)90-5578-8500          (cell)
Japan                | +81 (0)3 -3375-1767          (home)