[horde] How much memory to set memory_limit to?

[Michael M Slusarz]

Quoting Simon Brereton <simon.brereton at buongiorno.com>:

> On 25 November 2011 17:21, Michael M Slusarz <slusarz at horde.org> wrote:
>> Quoting Simon Brereton <simon.brereton at buongiorno.com>:
>>
>>> On 25 November 2011 16:20, Pro Green European
>>> <pro_green_european at yahoo.com> wrote:
>>>>
>>>> Hi.
>>>>
>>>> I've set 512M as the default memory_limit value in PHP for my webmail
>>>> system.
>>>>
>>>> How much should I really allocate? I think 512M is quite a lot of memory.
>>>>
>>>> I've tried with 384M, but it didn't take long before I started seeing
>>>> memory exhausted messages in Apache's error log.
>>>
>>> This was discussed at length a few weeks ago because of an issue I was
>>> having.  You should be able to find the thread in the archive.  Some
>>> were ok with 256, some recommended 512 and some even proposed 1024.
>>> Currently I'm up to 384, but I can go to 512 if I get more out of
>>> memory messages.
>>
>> And as I previously mentioned, all of these values seem exceedingly high.
>>  Especially for viewing a message.
>>
>> The only possibility of reaching this kind of memory use is by using the SQL
>> VFS backend.  This is now highly discouraged - use the filesystem VFS
>> backend instead.
>
> Thanks Michael.  I am indeed using the SQL VFS - I'll switch to the
> filesystem VFS and see.  However, I'm a little reluctant to do so
> without a better understanding of what gets placed.  Can you shed some
> light on that?  Also, I used the SQL VFS because that's what I was
> using in H3.  If filesystem is recommended for H4, then the drop-down
> option in the VFS tab should have a (recommended) next to it  (and
> perhaps a notes as to the reasons why).

It is mentioned in imp/docs/PERFORMANCE.

This is not something that should go into the base configuration  
file(s) - it is a performance issue, not a configuration issue.

michael

___________________________________
Michael Slusarz [slusarz at horde.org]