[Mono-list] Starting mod_mono in Apache, load jumps to 100% per connection

Ben Clewett ben at roadrunner.uk.com
Tue Oct 28 12:39:51 EDT 2008



Further, I have found that using:

MonoServerPath /usr/bin/mod-mono-server1

Fixed this problem.  Where as these contain the problem:

MonoServerPath /usr/bin/mod-mono-server
MonoServerPath /usr/bin/mod-mono-server2

Therefore I strongly suspect there is a bug in 2.  Unless another member 
may suggest something else?

Regards again, Ben.

Ben Clewett wrote:
> 
> I have just upgraded a working system from 1.9.1 to 2.0.1.
> 
> # mono --version
> Mono JIT compiler version 2.0.1 (tarball)
> Copyright (C) 2002-2008 Novell, Inc and Contributors. www.mono-project.com
>          TLS:           __thread
>          GC:            Included Boehm (with typed GC)
>          SIGSEGV:       altstack
>          Notifications: epoll
>          Architecture:  amd64
>          Disabled:      none
> 
> # uname -a
> Linux fls-16-06 2.6.25.5-1.1-default #1 SMP 2008-06-07 01:55:22 +0200 
> x86_64 x86_64 x86_64 GNU/Linux
> 
> Under this version I have a problem that when Apache starts, if a call 
> is made early to mod_mono, as in within about a second of the start, the 
> server load jumps to 100% per request.
> 
> Further this then locks out further requests, which also set on 100% 
> load.  Eg, a 8 connection will result in about 800% load:
> 
> 
>    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>   5651 wwwrun    20   0  253m  30m 8712 S  783  0.4  58:52.86 mono
> 
> 
> Where the process is running:
> 
> 
> /usr/bin/mono /usr/lib/mono/2.0/mod-mono-server2.exe --filename 
> /tmp/mod_mono_server_sdi_webservice --applications /:/usr/local/sdi/ws/ 
> --nonstop
> 
> 
> As far as I can see, these requests at 100% each will sit there for ever 
> more.
> 
> (If I user mod-mono-server.exe instead of server2, makes no difference.)
> 
> If any users have seen this behaviour, and may know where I can take 
> this, I would be very interested.  As now we have a dead unusable server!
> 
> Kind regards,
> 
> Ben
> 
> 
> 
> 
> 
> 
> 
> 
> *************************************************************************
> This e-mail is confidential and may be legally privileged. It is intended
> solely for the use of the individual(s) to whom it is addressed. Any
> content in this message is not necessarily a view or statement from Road
> Tech Computer Systems Limited but is that of the individual sender. If
> you are not the intended recipient, be advised that you have received
> this e-mail in error and that any use, dissemination, forwarding,
> printing, or copying of this e-mail is strictly prohibited. We use
> reasonable endeavours to virus scan all e-mails leaving the company but
> no warranty is given that this e-mail and any attachments are virus free.
> You should undertake your own virus checking. The right to monitor e-mail
> communications through our networks is reserved by us
> 
>   Road Tech Computer Systems Ltd. Shenley Hall, Rectory Lane, Shenley,
>   Radlett, Hertfordshire, WD7 9AN. - VAT Registration No GB 449 3582 17
>   Registered in England No: 02017435, Registered Address: Charter Court, 
>   Midland Road, Hemel Hempstead,  Hertfordshire, HP2 5GE. 
> *************************************************************************
> _______________________________________________
> Mono-list maillist  -  Mono-list at lists.ximian.com
> http://lists.ximian.com/mailman/listinfo/mono-list
> 


*************************************************************************
This e-mail is confidential and may be legally privileged. It is intended
solely for the use of the individual(s) to whom it is addressed. Any
content in this message is not necessarily a view or statement from Road
Tech Computer Systems Limited but is that of the individual sender. If
you are not the intended recipient, be advised that you have received
this e-mail in error and that any use, dissemination, forwarding,
printing, or copying of this e-mail is strictly prohibited. We use
reasonable endeavours to virus scan all e-mails leaving the company but
no warranty is given that this e-mail and any attachments are virus free.
You should undertake your own virus checking. The right to monitor e-mail
communications through our networks is reserved by us

  Road Tech Computer Systems Ltd. Shenley Hall, Rectory Lane, Shenley,
  Radlett, Hertfordshire, WD7 9AN. - VAT Registration No GB 449 3582 17
  Registered in England No: 02017435, Registered Address: Charter Court, 
  Midland Road, Hemel Hempstead,  Hertfordshire, HP2 5GE. 
*************************************************************************


More information about the Mono-list mailing list