Hello all,
Need some help with tuning and crash debugging. We're running Fedora-Directory/1.0.4
B2006.312.1539. The problem is on our "Dedicated Consumer" machine running on
RHEL 5. We have over ~150,000 users authenticating against our FDS systems. System
resources are not a problem (~.39 load, free memory, 92k swap)
For months, the system is solid without any issues then we seem to get a large spike in
traffic and FDS crashes. I run Monit so the service is restarted automatically but I
cannot figure out why the service keeps crashing.
FDS was setup and tuned based off:
http://directory.fedoraproject.org/wiki/Performance_Tuning#Linux
I have reviewed
http://directory.fedoraproject.org/wiki/FAQ#Debugging_Crashes as well, but
some of that is over my head. I have turned buffering off and increased the logging level
in the LDAP config.
Here is our "monitor" script output:
version: 1
dn: cn=monitor
objectClass: top
objectClass: extensibleObject
cn: monitor
version: Fedora-Directory/1.0.4 B2006.312.1539
threads: 30
currentconnections: 19
totalconnections: 11918
dtablesize: 8192
readwaiters: 0
opsinitiated: 43703
opscompleted: 43702
entriessent: 16086
bytessent: 2911011
currenttime: 20110805164243Z
starttime: 20110805114053Z
nbackends: 2
Here is our "Access Log Analyzer" summary for a 24 hour period:
---------------------------------------------------------------
Access Log Analyzer 6.0
Filename Total Lines Lines processed
---------------------------------------------------------------
/opt/fedora-ds/slapd/logs/access 298225 298231
----------- Access Log Output ------------
Restarts: 6
Total Connections: 39720
Peak Concurrent Connections: 84
Total Operations: 95471
Total Results: 95393
Overall Performance: 99.9%
Searches: 48215
Modifications: 167
Adds: 551
Deletes: 2
Mod RDNs: 0
6.x Stats
Persistent Searches: 0
Internal Operations: 0
Entry Operations: 0
Extended Operations: 845
Abandoned Requests: 0
Smart Referrals Received: 0
VLV Operations: 0
VLV Unindexed Searches: 0
SORT Operations: 0
SSL Connections: 0
Entire Search Base Queries: 0
Unindexed Searches: 6
FDs Taken: 39720
FDs Returned: 39657
Highest FD Taken: 93
Broken Pipes: 0
Connections Reset By Peer: 0
Resource Unavailable: 10872
- 10872 (T1) Idle Timeout Exceeded
Binds: 45691
Unbinds: 27987
LDAP v2 Binds: 15694
LDAP v3 Binds: 29997
SSL Client Binds: 0
Failed SSL Client Binds: 0
SASL Binds: 0
Directory Manager Binds: 0
Anonymous Binds: 16346
Other Binds: 29345
---------------------------------------------------------------
In FDS console:
-- Configuration > Performance tab: Size Limit: 2000, Time Limit: 3600, Idle Timeout:
60, Max file descriptors: 8192.
-- Configuration > Data > Database Link Settings > Connection Management: Max TCP
Connections: 10, Bind timeout: 20, Max binds per connection: 20, Timeout before abandon:
10, Max LDAP Connections: 20, Max bind retries: 3, Max operations per connection: 5,
connection life: 60.
We have talked about moving to the latest 389 Directory packages and I have a migration
process tested out so it's a matter of getting the OK and time but I doubt the upgrade
will solve our crashing problem. It seems to me we are hitting some limits that just
haven't been accounted for yet and that is where I need help.
Any suggestions on how to proceed with stopping these crashes is welcomed! Thanks for
reading.
Trevor
________________________________
This electronic message transmission contains information from Black Hills Corporation,
its affiliate or subsidiary, which may be confidential or privileged. The information is
intended to be for the use of the individual or entity named above. If you are not the
intended recipient, be aware the disclosure, copying, distribution or use of the contents
of this information is prohibited. If you received this electronic transmission in error,
please reply to sender immediately; then delete this message without copying it or further
reading.