Re: [Samba] smbd keeps maxing out the cpu, must reboot server constantly

Fri, 05 Jan 2007 12:49:53 -0800

Whoops. That's 2.66 ghz. Dual Core plus Hyperthreading gives 16 logical CPUs (8 cores hyperthreaded). 

James A. Dinkel wrote:

Yeah, I see the brief spikes when each user connects.  Those are nothing.  This 
is a dual-Xeon 3.6Ghz server (both assigned to the Ubuntu file server vm) with 
1GB of RAM assigned to this vm.  It's the only vm running on this ESX server.

Also top doesn't show a user smbd process maxing out the processor, it's the 
root smbd process.

-----Original Message-----
From: Aaron Kincer
Sent: Friday, January 05, 2007 10:00 AM
To: James A. Dinkel
Cc: [email protected]
Subject: Re: [Samba] smbd keeps maxing out the cpu, must reboot server
constantly
I just watched the top for a bit and did some testing and I see brief spikes on my system where each domain user has their own smbd process that grabs resources. This seems to happen when first opening a directory. It would seem that whatever resources Samba needs to complete this operation, my server has better access to or more of so that my server isn't hanging. Have you watched the resources on your domain controllers to see if they are seeing spikes too? 

James A. Dinkel wrote:

This is running in vmware, and I noticed occasionally wmware reports
that the cpu is being maxed out by a virtual machine.  Logging into the
virtual machine and running top confirms that the smbd process is maxing
out the cpu.  If I leave it alone for a while, eventually it starts
dropping connections and not letting people into the file server.
Killing the process with kill -9 does no good, it just immediately comes
back with a  new pid.  Stopping the service also does no good.  I have
to reboot the server, and occasionally even during the shutdown it will
hang (I left it for 30 minutes) and I have to kill the power.

I tried collecting logs from the time the max out started.  The computer
will run for a while, sometimes less than an hour, sometimes all day,
just fine, and then in less than a second the cpu goes from around 10%
to 100% and stays there until I reboot.  But the default logs tell me
nothing and the level 10 logs are Greek to me.

James Dinkel

PS.  Earlier this morning I switched to level 10 logs and when the "max
out" happened I checked the time in the VMWare performance graphs.  It
looks like it happened around 9:26:40 to 9:27:20.  Here are the VERY
LONG grep results for around that time in the logs:

sudo grep "2007/01/04 09:26" /var/log/samba/*
-------------------------------------------
/var/log/samba/192.168.0.202.log:[2007/01/04 09:26:12, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:26:12, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:26:12, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:26:12, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:26:12, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:26:42, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:26:42, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:26:42, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:26:42, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:26:42, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:26:39, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:26:39, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:26:39, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:26:39, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:26:39, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.10.168.log:[2007/01/04 09:26:30, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.10.168.log:[2007/01/04 09:26:30, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.10.168.log:[2007/01/04 09:26:30, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.10.168.log:[2007/01/04 09:26:30, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.10.168.log:[2007/01/04 09:26:30, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:26:57, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:26:57, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:26:57, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:26:57, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:26:57, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:26:10, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:26:10, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:26:10, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:26:10, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:26:10, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:26:44, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:26:44, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:26:44, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:26:44, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:26:44, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:26:34, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:26:34, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:26:34, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:26:34, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:26:34, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:04, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)
/var/log/samba/smbd.log.old:[2007/01/04 09:26:39, 5]
lib/util_sock.c:print_socket_options(206)

sudo grep "2007/01/04 09:27" /var/log/samba/*
------------------------------------------------
/var/log/samba/192.168.0.202.log:[2007/01/04 09:27:12, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:27:12, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:27:12, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:27:12, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.0.202.log:[2007/01/04 09:27:12, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:27:42, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:27:42, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:27:42, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:27:42, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.0.225.log:[2007/01/04 09:27:42, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:27:39, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:27:39, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:27:39, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:27:39, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.10.166.log:[2007/01/04 09:27:39, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 6]
param/loadparm.c:lp_file_list_changed(3006)
/var/log/samba/192.168.10.185.log:[2007/01/04 09:27:57, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:27:10, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:27:10, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:27:10, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:27:10, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.2.103.log:[2007/01/04 09:27:10, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:27:44, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:27:44, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:27:44, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:27:44, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.2.111.log:[2007/01/04 09:27:44, 10]
smbd/process.c:setup_select_timeout(1284)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:27:34, 3]
smbd/sec_ctx.c:set_sec_ctx(241)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:27:34, 5]
auth/auth_util.c:debug_nt_user_token(448)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:27:34, 5]
auth/auth_util.c:debug_unix_user_token(474)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:27:34, 5]
smbd/uid.c:change_to_root_user(275)
/var/log/samba/192.168.9.58.log:[2007/01/04 09:27:34, 10]
smbd/process.c:setup_select_timeout(1284)





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