[horde] Error: No connection to server

[Michael M Slusarz]

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

> On 4 November 2011 14:58, Michael M Slusarz <slusarz at horde.org> wrote:
>> Quoting Eric Jon Rostetter <eric.rostetter at physics.utexas.edu>:
>>
>>> Quoting Simon Brereton <simon.brereton at buongiorno.com>:
>>>
>>>> This doesn't explain why it's this one user.  This doesn't explain why
>>>
>>> It doesn't exclude it either.
>>>
>>>> Finally, what would you suggest is a suitable memory limit for ~100
>>>> users?  Currently I have 128M (which is about 7 times the php
>>>> default).
>>>
>>> Doesn't matter the number of users.  The official response is to
>>> set no limit.  I don't recommend that myself.  Mine is set to 1024M,
>>> up from the previous 512M I used for for a while, up from the 128M
>>> I used years ago but is certainly no longer enough.
>>>
>>>> 456 ; Maximum amount of memory a script may consume (128MB)
>>>> 457 ; http://php.net/memory-limit
>>>> 458 memory_limit = 128M
>>>
>>> I'd raise that to at least 512M, and no more than 1024M, myself. Though
>>> like I say, the official recommendation is to set it to unlimited.
>>
>> I run 64MB, and have been for years.  Other than sending/viewing extremely
>> large attachments, I have no issues.
>>
>> To allow viewing of large attachments, 128 MB may be more appropriate.  But
>> I also strongly suggest limiting attachment upload size, to eliminate that
>> potential issue.
>
>
> Michael - I agree.  64M should be enough.  128 should be luxurious.
>
> On the old server running H3, the memory limit was 32MB and there was
> never an issue either in imp or dimp.  I increased the memory limit on
> the new one in part because of the increase of RAM allowed me to do
> so.

Then you were extremely lucky.  32M *never* worked for me in Horde 3.   
Sending a 1MB message that required base64 encoding would often take  
30-40MB (mainly due to issues with PHP's native base64 encoding,  
inefficiencies in the pHP imap module, duplication of memory by the DB  
library, duplication of memory by the Mail library).

> However, I can definitely reproduce this - as soon as I downgrade the
> memory limit to 128M, the portal page fails to display (either on
> login or changing the URL first to IMP and then going to the portal).
> If I had the time I could downgrade Horde to the previous version and
> run some more tests.  On this site postfix doesn't accept mails larger
> than 20MB anyway and hence the upload size is set to the same amount.

So it's a portal issue.  Try disabling the sidebar menu.

michael

___________________________________
Michael Slusarz [slusarz at horde.org]