Bug 5048 - samba memory leak? exhausts swap
samba memory leak? exhausts swap
Status: RESOLVED WONTFIX
Product: Samba 3.0
Classification: Unclassified
Component: File Services
3.0.26a
x64 FreeBSD
: P3 major
: none
Assigned To: Samba Bugzilla Account
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Reported: 2007-10-26 14:52 UTC by tim newsham (550 5.1.1 User unknown)
Modified: 2015-01-08 12:52 UTC (History)
1 user (show)

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Description tim newsham (550 5.1.1 User unknown) 2007-10-26 14:52:53 UTC
My samba process is exhausting all memory and running out of swap while performing a large file copy from my WindowsXP machine to my FreeBSD samba server.  If I completely restart samba it starts off utilizing about 50% of my 100mbit ethernet link and slowly degrades down to below 10%.  Then after about 15 minutes it is killed:
   pid 47755 (smbd), uid 500, was killed: out of swap space
I noticed while performing a smaller copy that the server process was growing in size.  I observed it when it was already about 800-900MB and watched it grow to larger than 1GB before the copy completed.

I'm running FreeBSD 6.2-STABLE from aprox late july with a samba that was built from the ports tree updated about mid september:
  # $FreeBSD: ports/net/samba3/Makefile,v 1.162 2007/09/18 22:27:57 timur Exp $
  PORTVERSION?=           3.0.26a
I can provide more information or perform tests if it is helpful.
Comment 1 tim newsham (550 5.1.1 User unknown) 2007-10-26 15:34:56 UTC
Ugh, so after I reported this, it is not happening any more.  The only change I can think of is I noticed very old smbd and nmbd processes around and I killed them off.  Is it possible that having an older server running would interfere with a newer instance in a way to cause this behavior?  In any case, I cannot currently reproduce this behavior.  The current observed behavior is that my smbd processes are not taking up significant amounts of memory and are operating around 60% of 100MB bandwidth and does not seem to degrade while copying very large files.
Comment 2 David Disseldorp 2015-01-08 12:52:10 UTC
Thanks for the report Tim. Samba 3.0 is no longer maintained, please reopen this bug if you are able to reproduce it in more recent Samba releases.