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Date: Wed, 1 May 2013 11:52:57 +0200
Message-ID: 
 <CAANDF53yiatnq2GPejzTDwaQo2jni2F2RA-tdPUmo7g+fCasFg@mail.gmail.com>
Subject: Re: CouchDB 1.2.0 Keeps Crashing.
From: Pieter van der Eems <p.van.der.eems@interactiveblueprints.nl>
To: user@couchdb.apache.org
Content-Type: text/plain; charset=ISO-8859-1

2013/5/1 Robert Newson <rnewson@apache.org>:
> I'd set it to 10000 and then forget it about it.
That sounds a bit high.

> File descriptors are pretty cheap these days.
That's what I thought about inodes as well but
we've already hit that wall (tip: use xfs when
using a lot of small files).

Pieter.

>
> On 1 May 2013 10:29, Pieter van der Eems
> <p.van.der.eems@interactiveblueprints.nl> wrote:
>> 2013/5/1 Benoit Chesneau <bchesneau@gmail.com>:
>>> On Wed, May 1, 2013 at 11:00 AM, Pieter van der Eems
>>> <p.van.der.eems@interactiveblueprints.nl> wrote:
>>>> 2013/5/1 Benoit Chesneau <bchesneau@gmail.com>:
>>>>> On Wed, May 1, 2013 at 10:44 AM, Benoit Chesneau <bchesneau@gmail.com> wrote:
>>>>>> On Wed, May 1, 2013 at 10:38 AM, Pieter van der Eems
>>>>>> <p.van.der.eems@interactiveblueprints.nl> wrote:
>>>>>>
>>>>>>>
>>>>>>> Is the file descriptor a couchdb limit that I can change (where?) or a
>>>>>>> filesystem limit (ext4, we've already hit ext4 limit before but the
>>>>>>> errors were different).
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> man ulimit(3)
>>>>>>
>>>>>> - benoit
>>>>>
>>>>>
>>>>> in clear, either use the ulimit command to increase the limits at
>>>>> runtime or increase them either in security.conf or limits.conf
>>>>> depending on your system.
>>>> Ubuntu 11.10 (it needs updating, just haven't had the time yet).
>>>>
>>>>>
>>>>> Probably /etc/security/limits.conf in your case.
>>>> That looks like the one.
>>>>
>>>>
>>>>> I'm actually
>>>>> interrested by the limit you already have, can you paste the result of
>>>>> ` ulimit -n`  ?
>>>>
>>>> It's 1024
>>>> That seems to be the default.
>>>> My own desktop (Ubuntu 12.04) has the same.
>>>>
>>>> We have more than that number of databases (1134 as of now).
>>>>
>>>
>>> Thanks, you should try to slowly iincrease the limits of the user
>>> launching couchdb to test which one is good for you, it all depends on
>>> the number of max dbs opened, number of requests and view calculated
>>> at the same time
>> Hmm. I really should find the time to install a test server for this
>> and create a simulation. Currently the only way to "test" this is on a
>> live environment that serves live customers.
>>
>> For now I've set it to 2048.
>>
>> Regards,
>> Pieter.