Mod performance on multi-valued attributes
[141 byte] By [mike.nepomny] at [2007-11-26 11:47:16] 
Is there any way to improve mod performance of DS5.2P4 that has a lot of frequently modified multi-valued attributes?Thank you.
# 1
Not with DS 5.2 P4.Directory Server 6 does have several improvements in that area, especially for attributes with a DN syntax.Regards,Ludovic.ludovicp at 2007-7-7 11:58:25 >
# 2
I installed DSEE6 on Solaris 10 and tried MOD on multi-valued attributes again ?still very slow .1000 modifications took over 4 minutes on V240.Are there any tricks that will make this operation faster on DSEE6?Thank you.mikenepomny at 2007-7-7 11:58:26 >
# 3
Hi,
are you always modifying the same entry/attribute? In that case, the modifications will get slower and slower with each execution. 4 minutes sounds really long for 1000 modifications.
If you want faster MOD performance, the best way is to use faster disk systems that use write caches.
Regards,
Holger
Ewiron at 2007-7-7 11:58:26 >
# 4
I definitely agree that 4 minutes seems long for a 1000 modifications.However with Directory Server 6.0, modifying the same attribute over and over should not have any impact on the modification time and performances.Ludovicludovicp at 2007-7-7 11:58:26 >
# 5
There are different ways to tune Directory Server for write performance.
The area to consider are :
- DB cache size and location of the db-home-directory
- Entry cache size and overall memory available
- Spreading writes to multiple disks. For example, putting logs, transaction logs and the DB on separated disks
- Useful vs useless indexes
- Disks performances
...
You may also want to check "cn=Directory Manager" blog <http://blogs.sun.com/DirectoryManager" about performance tips.
Regards,
Ludovic.>
ludovicp at 2007-7-7 11:58:26 >
# 6
I performed some tuning and re-run the test. This time it took only 40 sec.Thank you.mikenepomny at 2007-7-7 11:58:26 >
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