How to solve poor performance problem with Samba3x in RHEL5?
Environment
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Red Hat Enterprise Linux 5 Update 6
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Samba versions 3.3.28 and 3.5.4 (samba3x series)
- Samba serving as a CUPS print spooler
Issue
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Using samba3.0 in a printer server solution (samba+winbind+ cups) everything was ok. After migration to samba3x (initially samba3.3) customer notice a high CPU and
memory utilization. -
Once this performance problem occurs, samba stop responding requests due lack of resources.
Resolution
There is a performance problem in these versions due the number of calls samba is doing. It was considered a bug and the fix is now available via Errata: RHBA-2011:1007
The solution is update samba package for version samba3x-3.5.4-0.83 that contains a fix for this issue or newer version.
Root Cause
The problem was caused by the following bug that was already fixed:
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