[Mono-list] mod-mono-server process busy 100% or 200% CPU

[Maxim]

Hello Rodrigo!

OK, I'll update Mono in few days.
Is XSP2 project still supported? Are there any commits to it since 3.2.6?

About Yandex. I don't know :)
I'm not an yandex employee.
Yandex.ru is just a russian public mail service like gmail or yahoo.

With kind regards,
Max Karavaev

On 09/04/2014 12:23 AM, Rodrigo Kumpera wrote:
> Hey Maxim,
>
> You should try a more recent mono. 3.2.6 is quite old.
>
> Just curious, are you trying to use mono at yandex?
>
> --
> Rodrigo
>
>
>
>
> On Wed, Sep 3, 2014 at 9:03 AM, Maxim <makska at yandex.ru 
> <mailto:makska at yandex.ru>> wrote:
>
>     Hello!
>
>     I've just created ASP.Net website and ran it on Apache&mono on Linux.
>     And I've got strange situation. After 50.000-100.000 requests
>     mod-mono-server process unexpectedly become busy with 100% or 200%
>     (exactly) CPU load.
>     After restarting mono process via mono-ctl panel cpu consumption returns
>     to 1-3%.
>     I've found some errors like
>     [Wed Sep 03 16:02:57 2014] [error] (32)Broken pipe: write_data failed
>     [Wed Sep 03 16:02:57 2014] [error] (32)Broken pipe: write_data failed
>     [Wed Sep 03 16:02:57 2014] [error] command failed: failed to get client
>     block (data)
>     in apache error_log, but it seems like there are no relations in time
>     between these errors and busy moment.
>
>     So, the questions:
>     1) are there any way to know what is happening in this situation? What
>     threads are running, etc... I'm not sure the reason is in mono itself, may
>     be the reason is in my application. Full profiling on production server is
>     not possible, I mean just a few statistics,
>     2) if the reason is in garbage collector: are there any ways to tune it?
>     Or to switch from sgen to old Boehm or so on?
>
>     Any help are highly appreciated!
>
>     P.S. Mono 3.2.8 compiled from sources on standard CentOS 6.5
>     # mono -V
>     Mono JIT compiler version 3.2.8 (tarball Wed Jun 11 00:48:42 MSK 2014)
>     Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors.
>     www.mono-project.com <http://www.mono-project.com>
>         TLS:           __thread
>         SIGSEGV:       altstack
>         Notifications: epoll
>         Architecture:  amd64
>         Disabled:      none
>         Misc:          softdebug
>         LLVM:          supported, not enabled.
>         GC:            sgen
>
>     # httpd -v
>     Server version: Apache/2.2.15 (Unix)
>     Server built:   Apr  3 2014 23:56:16
>
>     # uname -a
>     Linux web1.server 2.6.32-431.17.1.el6.x86_64 #1 SMP Wed May 7 23:32:49 UTC
>     2014 x86_64 x86_64 x86_64 GNU/Linux
>
>
>     With best wishes,
>     Max Karavaev
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>