[Freeswitch-users] CPU Spikes every 20 minutes
Ken Rice
krice at freeswitch.org
Mon Oct 22 23:50:08 MSD 2012
Load Average is the number of threads/processes waiting in the kernel¹s run
queue at sample time... Supposedly number of cores is the how much your load
avg can get to before your boxes is exhausted but this isnt exactly true on
modern hardware with highly multi-threaded software like FreeSWITCH...
Where did I get the 100+ number? From looking at Œtop¹ or Œw¹ on a box to
see what the current load avg is...
Sqlite is used all over FreeSWITCH from the coredb to mod_sofia and
everything in between.... When you type Œshow channels¹ from fs_cli it
doesn¹t query the structures in RAM to show you that output, it pulls it
from the sqlite db...
That being said, you can test quickly to see if sqlite is hammering the disk
at some point by shifting freeswitch/db dir to a ram drive.
Example code for linux such as Centos or Debian assuming freeswitch is
installed to /usr/local/freeswitch
Shutdown freeswitch
rm rf /usr/local/freeswitch/db/*
mount t tmpfs tmpfs /usr/local/freeswitch/db
Startup freeswitch
Once you have done that stick it back in rotation...
Note this will not affect anything but voicemail if you have voicemail
running on that box and not using an external DB via mod_voicemail¹s DSN
settings you¹ll lose the voicemail DB... (I would assume this is not the
case since you are using this primarily as a Transcoder)
K
On 10/22/12 2:30 PM, "Ricardo Martinez" <rmartinez at redvoiss.net> wrote:
> Hi Ken.
> Maybe that is the problem. I was sure that the ³load average² can¹t go more
> than #cores in your system. In my case I have 8 cores, so a ³load average² of
> 12 is high from my point of view. Where did you get the number 100 for this
> parameter?
> Anyway, what is running a sqlite in freeswitch. Does this have to do with the
> core.db file? Or with the cdr_sqlite module?.
>
> Thanks
> Ricardo.-
>
>
> De: freeswitch-users-bounces at lists.freeswitch.org
> [mailto:freeswitch-users-bounces at lists.freeswitch.org] En nombre de Ken Rice
> Enviado el: lunes, 22 de octubre de 2012 16:18
> Para: FreeSWITCH Users Help
> Asunto: Re: [Freeswitch-users] CPU Spikes every 20 minutes
>
> Could it be just a normal sqlite running a vacuum?
>
> Sqlite does this every so often or if its calling a sync....
>
> Also freeswitch with a load avg of 12 for a short period of time isnt anything
> to really worry about. Due to the number of threads that¹s possible with FS
> (ie: 1 per call leg) its not unusual to see a box humming along and the load
> avg well above 100 in my experience... This is due to the number of threads
> waiting in the run queue when it was sampled... Now, that¹s not saying that
> this is not specifically indicative or a problem but something else to think
> about
>
> On 10/22/12 1:52 PM, "Ricardo Martinez" <rmartinez at redvoiss.net> wrote:
> This is the gdb from the proccess consuming more cpu :
>
> (gdb) thread 7
> [Switching to thread 7 (Thread 31781)]#0 0x0000003c03c0e047 in fsync () from
> /lib64/libpthread.so.0
> (gdb) bt
> #0 0x0000003c03c0e047 in fsync () from /lib64/libpthread.so.0
> #1 0x00002aede19276de in unixSync (id=0x2aaaac726380, dataOnly=<value
> optimized out>) at ./src/os_unix.c:1229
> #2 0x00002aede1951178 in syncJournal (pPager=0x1a1c200) at ./src/pager.c:2229
> #3 0x00002aede1953b65 in sqlite3pager_sync (pPager=0x1a1c200, zMaster=0x0,
> nTrunc=0) at ./src/pager.c:3770
> #4 0x00002aede193d07b in sqlite3BtreeSync (p=<value optimized out>,
> zMaster=0x0) at ./src/btree.c:6520
> #5 0x00002aede1931f15 in sqlite3VdbeHalt (p=0x2aaaad17ac70) at
> ./src/vdbeaux.c:1062
> #6 0x00002aede1962613 in sqlite3VdbeExec (p=0x2aaaad17ac70) at
> ./src/vdbe.c:2360
> #7 0x00002aede193036c in sqlite3Step (pStmt=0x2aaaad17ac70) at
> ./src/vdbeapi.c:236
> #8 sqlite3_step (pStmt=0x2aaaad17ac70) at ./src/vdbeapi.c:289
> #9 0x00002aede1938978 in sqlite3_exec (db=0x1a1f070, zSql=0x2aede199e717
> "COMMIT", xCallback=0, pArg=0x0, pzErrMsg=0x4178bed0)
> at ./src/legacy.c:78
> #10 0x00002aede18ae0c1 in switch_core_db_exec (db=0x1a1f070,
> sql=0x2aede199e717 "COMMIT", callback=0, data=0x0, errmsg=0x4178bf38)
> at src/switch_core_db.c:93
> #11 0x00002aede1897c18 in switch_cache_db_execute_sql_real (dbh=0x1a2dce0,
> sql=0x2aede199e717 "COMMIT", err=0x0)
> at src/switch_core_sqldb.c:445
> #12 0x00002aede18985c3 in switch_cache_db_persistant_execute_trans
> (dbh=0x1a2dce0,
> sql=0x5f03bd0 "delete from calls where
> (caller_uuid='e64319c5-7f91-47a1-9561-42da291e499a' or
> callee_uuid='e64319c5-7f91-47a1-9561-42da291e499a') and
> hostname='transcoder.red.net <http://transcoder.red.net>
> <http://transcoder.red.net> ';\ndelete from calls where (call"..., retries=1)
> at src/switch_core_sqldb.c:787
> #13 0x00002aede189bf1c in switch_core_sql_thread (thread=<value optimized
> out>, obj=<value optimized out>)
> at src/switch_core_sqldb.c:1026
> #14 0x0000003c03c0673d in start_thread () from /lib64/libpthread.so.0
> #15 0x0000003c030d3f6d in clone () from /lib64/libc.so.6
>
>
> De: Ricardo Martinez [mailto:rmartinez at redvoiss.net]
> Enviado el: lunes, 22 de octubre de 2012 15:50
> Para: 'FreeSWITCH Users Help'
> Asunto: RE: [Freeswitch-users] CPU Spikes every 20 minutes
>
> AS far as i can see there is no java running.
> This is the top at the moment of the spike :
>
> top - 15:48:29 up 17 days, 14:55, 3 users, load average: 14.07, 8.87, 6.48
> Tasks: 158 total, 1 running, 157 sleeping, 0 stopped, 0 zombie
> Cpu(s): 12.6%us, 9.0%sy, 0.0%ni, 66.1%id, 2.7%wa, 0.3%hi, 9.2%si, 0.0%st
> Mem: 8171500k total, 8041556k used, 129944k free, 177688k buffers
> Swap: 10223608k total, 0k used, 10223608k free, 6951988k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
> COMMAND
> 31772 root 15 0 870m 481m 6880 S 212.4 6.0 9523:51
> freeswitch
> 4210 root 19 0 36344 2940 1444 S 1.0 0.0 56:21.08
> sngtc_server
> 29586 root 15 0 12740 1132 808 R 0.3 0.0 0:00.02
> top
> 1 root 15 0 10348 704 588 S 0.0 0.0 0:01.13
> init
> 2 root RT -5 0 0 0 S 0.0 0.0 0:00.41
> migration/0
> 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/0
> 4 root RT -5 0 0 0 S 0.0 0.0 0:00.00
> watchdog/0
> 5 root RT -5 0 0 0 S 0.0 0.0 0:00.83
> migration/1
> 6 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/1
> 7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
>
> 8 root RT -5 0 0 0 S 0.0 0.0 0:00.14
> migration/2
> 9 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/2
> 10 root RT -5 0 0 0 S 0.0 0.0 0:00.00
> watchdog/2
> 11 root RT -5 0 0 0 S 0.0 0.0 0:00.07
> migration/3
> 12 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/3
> 13 root RT -5 0 0 0 S 0.0 0.0 0:00.00
> watchdog/3
> 14 root RT -5 0 0 0 S 0.0 0.0 0:00.06
> migration/4
> 15 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/4
> 16 root RT -5 0 0 0 S 0.0 0.0 0:00.00
> watchdog/4
> 17 root RT -5 0 0 0 S 0.0 0.0 0:00.06
> migration/5
> 18 root 34 19 0 0 0 S 0.0 0.0 0:00.00
> ksoftirqd/5
> 19 root RT -5 0 0 0 S 0.0 0.0 0:00.00
> watchdog/5
> 20 root RT -5 0 0 0 S 0.0 0.0 0:00.07
> migration/6
>
>
> Regards,
> Ricardo.-
>
> De: freeswitch-users-bounces at lists.freeswitch.org
> [mailto:freeswitch-users-bounces at lists.freeswitch.org] En nombre de Guillermo
> Ruiz Camauer
> Enviado el: lunes, 22 de octubre de 2012 15:38
> Para: FreeSWITCH Users Help
> Asunto: Re: [Freeswitch-users] CPU Spikes every 20 minutes
>
> Do you have anything like Java running that could be doing garbage collection?
>
>
>
> What other processes are running on the machine? Does TOP show which process
> is causing the spike?
>
>
>
> Guillermo
>
> On Mon, Oct 22, 2012 at 3:29 PM, Ricardo Martinez <rmartinez at redvoiss.net>
> wrote:
> Hi Gabe.
> I'm mean between the spikes there is nothing different as regarding to the
> calls... the cps maintains the same.. there are no scripts running or
> crontabs running, the simultaneous calls are the same also. So, for some
> reason the "load average" start to grow (every 20 or 25 minutes) without
> any clear cause.
> I have debug with gdb the moment the server is with 12.5 of "load average"
> here : http://pastebin.freeswitch.org/20112
>
> Can we detect a problem from here?
>
> Regards,
> Ricardo.
>
>
>
> -----Mensaje original-----
> De: freeswitch-users-bounces at lists.freeswitch.org
> [mailto:freeswitch-users-bounces at lists.freeswitch.org] En nombre de
> Gabriel Gunderson
> Enviado el: lunes, 22 de octubre de 2012 13:31
> Para: FreeSWITCH Users Help
> Asunto: Re: [Freeswitch-users] CPU Spikes every 20 minutes
>
>
> On Mon, Oct 22, 2012 at 8:37 AM, Ricardo Martinez <rmartinez at redvoiss.net>
> wrote:
>> > The problem is that I'm having weird spikes of "load average" cpu
>> > every 20 minutes (aprox), without any reason, reaching near of 12.5 of
>> > load average for this machine.
>
> What have you done to verify that it happens 'without any reason'?
>
>
> Gabe
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
>
>
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
>
>
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>
>
--
Ken
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org
irc.freenode.net #freeswitch
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20121022/3c6351f2/attachment-0001.html
Join us at ClueCon 2011 Aug 9-11, 2011
More information about the FreeSWITCH-users
mailing list