Re: Poor performance on Solaris

[Jorgen Lundman <lundman@lundman.net>]

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.


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