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Quanah,
Please see answer in your previous e-mail below.
I'm also sending the information I could collect attached since it is a small file(5KB).
The behavior that appears strange and that could indicate a problem is the fact that even when consumer is stopped the provider still doing something for a long time. This doesn't appear to be correct.
Other strange behavior is that when system enters in this state one provider CPU stays running around 100% CPU usage. I made a jmeter script to test individual bind/search(no ldapsearch *) and then even with some load(like 200 simultaneous query) I do not see CPU in 100%. Something doesn't appear to be ok since I do not see why CPU should enter in 100% permanently.
Regards,
Rodrigo.
Quanah Gibson-Mount wrote:
--On Tuesday, August 25, 2009 6:16 PM +0000 rlvcosta@yahoo.com wrote:
The issue I'm facing is related, in a general user view, is when I stop the secondary Provider2(master 2) for backup purposes using slapcat. The Provider1(master 1) continues to provide ldap service where some entrances can be created during the time backup is running(no consumer from Provider 2).
Why are you stopping the provider to do a slapcat?
[Rodrigo]Faster dump of data. And in any case if other situation like a problema occurs the secondary system could stay disconnect for other reasons.
Even a small number of entrances are different when consumer in Provider 2 connects to Provider 1 then syncrepl enters in the full DB search as expected.
What is your sessionlog setting on each provider for the syncprov overlay?
[Rodrigo] syncprov-checkpoint 10000 120 syncprov-sessionlog 100000
Same configuration in both systems.
For definition purposes I have some memory limitations where I need to limit dncachesize for around 80% of DB entrances.
We already went through other things you could do to reduce your memory footprint in other ways. You've completely ignored that advice. As long as your dncachesize is in this state, I don't expect things to behave normally.
[Rodrigo]I implemented what was possible. The end is this cache config possible by the memory constraints : #Cache values #cachesize 10000 cachesize 20000 dncachesize 3000000 #dncachesize 400000 #idlcachesize 10000 idlcachesize 30000 #cachefree 10 cachefree 100
I could also note that when in this situation the monitor cache, in a very slow pace, changes the cache in a single entrance. Being more specific :
dn: cn=Database 1,cn=Databases,cn=Monitor structuralObjectClass: monitoredObject creatorsName: modifiersName: createTimestamp: 20090821145848Z modifyTimestamp: 20090821145848Z monitoredInfo: bdb monitorIsShadow: TRUE namingContexts: ou=CONTENT,o=domain,c=fr readOnly: FALSE monitorOverlay: syncprov olmBDBEntryCache: 19920 olmBDBDNCache: 3896287 olmBDBIDLCache: 2 olmDbDirectory: /var/openldap-data/bdb1/ entryDN: cn=Database 1,cn=Databases,cn=Monitor subschemaSubentry: cn=Subschema hasSubordinates: TRUE
Stays running in the values 3896287 and 3896288. Looks like the memory re-use is being too short causing locks that takes long time causing a non synchronization.
What value did you set for "cachefree"?
[Rodrigo] cachefree 100
PS-> I could not put the file in the openldap ftp. It says device full. Please let me know how can I send this file.
I've let the maintainer of the system know, hopefully there'll be space available soon.
[Rodrigo]I'm sending file attached since it is very small 5KB.
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc
Zimbra :: the leader in open source messaging and collaboration
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