On 08/09/2018 01:53 AM, William Brown wrote:
In the audit-log there is nothing what would explain this. But in
iotop
I see a lot of threads like:
The audit log itself (and search log) will generate IO themself :)
1621 be/4 dirsrv 0.00 B/s 3.95 K/s 0.00 % 0.46 % ns-slapd
-D
/etc/dirsrv/slapd-ldap0 -i /var/run/dirsrv/slapd-ldap0.pid -w
/var/run/dirsrv/slapd-ldap0.startpid
Sadly this doesn't tell us much :(
we could get a pstack along with iotop to see which threads do teh IO,
regular mods or the BDB regulars like trickle, checkpointing ....
I configured caching and have entrycachehits about 99 - but anyway
this
would have only impact to read-operations.
DBcache would help with writes.
What's conspicuous: One of the three server has a significant higher
write rate than the others. When I watch our munin stats the two
other
have with 40 to 60 write operations per second 10 times less. And
one
of the server suddenly reduces write-rates from more than 100 to
averate 50.
It would be good to see the ldbm config here I think. It would also be
good to know what kind of work load you have. In some configurations of
the network, things like load balancers could be sending more
read/write traffic to one server, rather than over all of them.
Another spot to check is your log buffer size, as it may be small
(causing the threads to all be writing small ammounts). The logging
subsystem is slated for a rework in the future to make it more
scalable.
Hope that helps,
Any idea?
Regards
Jan
_______________________________________________
389-users mailing list -- 389-users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to
389-users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
List Guidelines:
https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives:
https://lists.fedoraproject.org/archives/list/389-users@xxxxxxxxxxxxxxxxxxxxxxx/message/5RJFPA26IXAGXXLJWEFLZF2QVCBFUED5/
--
Red Hat GmbH, http://www.de.redhat.com/, Registered seat: Grasbrunn,
Commercial register: Amtsgericht Muenchen, HRB 153243,
Managing Directors: Charles Cachera, Michael Cunningham, Michael O'Neill, Eric Shander
_______________________________________________
389-users mailing list -- 389-users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to 389-users-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/389-users@xxxxxxxxxxxxxxxxxxxxxxx/message/5UZUN4N32SK33DHR4ZWMZE52A2HBFYV7/
