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From Leif Hedstrom <>
Subject Re: ram_cache size > 2GB
Date Thu, 16 Sep 2010 19:17:24 GMT
  On 09/16/2010 01:08 PM, Pranav Desai wrote:
> On Thu, Sep 16, 2010 at 7:25 AM, Leif Hedstrom<>  wrote:
>>   Ok, looked at this, this is a bug in traffic_shell, see the patch below for
>> a fix (I'll commit this today to trunk).
> Thanks, the patch worked for me.
>> While I'm at it, with these large RAM caches, it's very important that you
>> configure the kernel to handle a large number of mmap areas. The default (on
>> linux) is only 64k, which is way too small. You can increase this, by adding
>> something like this to /etc/sysctl.conf:
>>     vm.max_map_count = 2097152
> Will do that.
> Currently I am trying to get some baseline numbers with the default
> settings and I seeing a lot of errors in /var/log/messages and even
> crashes. With the same load I don't see these messages in 2.0.1. I
> will open another thread with more details for that.

Hmmm, that's not good, it'd be great to get some bug reports / stack 
traces on those crashes. Are you building from "trunk"?

-- Leif

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