[Samba] High CPU with 3.0.14a in FC4
Brad Horrocks (Secure Office Services)
bradhorrocks at secureoffice.com.au
Tue Jul 26 00:53:08 GMT 2005
Jerry,
The strace I ran output is:-
[root at sos01ww samba]# strace -p 769 -cfqrT
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
49.57 32.179651 40 805953 write
20.04 13.007770 16 806396 geteuid32
17.97 11.667455 31 373072 367 stat64
9.07 5.887281 19 310574 time
1.03 0.669108 295 2271 select
0.90 0.582924 18 32319 32319 getxattr
0.48 0.314502 9 34337 gettimeofday
0.41 0.265785 117 2272 send
0.20 0.128447 98 1308 pread
0.11 0.072433 16 4543 read
0.07 0.045187 32 1434 getdents64
0.07 0.042480 21240 2 rename
0.03 0.018578 11 1717 fcntl64
0.02 0.009879 30 333 5 open
0.01 0.005523 9 616 fstat64
0.01 0.004163 13 318 close
0.00 0.003181 21 148 setresuid32
0.00 0.001974 5 398 getegid32
0.00 0.001259 7 187 176 kill
0.00 0.000971 7 148 setresgid32
0.00 0.000883 9 101 setgroups32
0.00 0.000762 51 15 pwrite
0.00 0.000467 5 99 getgid32
0.00 0.000427 4 99 getuid32
0.00 0.000321 11 29 flock
0.00 0.000282 141 2 unlink
0.00 0.000154 39 4 ftruncate64
0.00 0.000078 11 7 dup2
0.00 0.000077 26 3 brk
0.00 0.000063 5 14 umask
0.00 0.000050 17 3 chdir
0.00 0.000050 17 3 1 lstat64
0.00 0.000018 3 6 nanosleep
0.00 0.000015 8 2 2 fgetxattr
0.00 0.000012 12 1 getpeername
0.00 0.000004 4 1 getgroups32
------ ----------- ----------- --------- --------- ----------------
100.00 64.912214 2378735 32870 total
This was taken during the application startup which takes upwards of 60 seconds...
The qmail servers don't appear to be using any additional cpu although it is
hard to tell as qmail is used only for 5 users.
I noticed the getxattr errors and was wondering if the upgrade from FC1 to FC4
(kernel 2.4 -> 2.6) would introduce some sort of application overhead for
acl's that was not present in the 2.4 kernel??? Just a thought.
If there is anything else I can provide please let me know
Regards
Brad Horrocks
--
Secure Office Services
ABN 75 196 364 531
19 Burrendong Road
COOMBABAH QLD 4216
Ph. +61 7 5537 4955
Fx. +61 7 5537 4966
web: http://www.secureoffice.com.au
---------- Original Message -----------
From: "Gerald (Jerry) Carter" <jerry at samba.org>
To: bradhorrocks at secureoffice.com.au
Cc: samba at lists.samba.org, fenlason at redhat.com
Sent: Mon, 25 Jul 2005 08:07:31 -0500
Subject: Re: [Samba] High CPU with 3.0.14a in FC4
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Brad Horrocks (Secure Office Services) wrote:
>
> | The problem we are experiencing is that the standard
> | daemon processes [SMBD] are using significantly more
> | CPU [processes that were running a 10% are now running
> | at over 40%].
> |
> | Has anybody seen or heard of this before or is this a
> | FC4 specific problem. The boxes are primarily Windows
> | file sharers but they do run qmail as well.
>
> I've found what I believe to be kerberos bugs in FC4.
> Brad, Can you do an strace and see what the processes
> are doing ? Are other servers (e.g. qmail) using more
> CPU as well? Or just smbd?
>
> Jay, have you observed any similar behavior (increaed
> CPU usage).
>
> cheers, jerry
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