[horde] Problem of slow with server-side sorting

[Ronan SALMON]

 lst_hoe02 at kwsoft.de a écrit :

> Zitat von Steve Devine <sd at msu.edu>:
>
>> Quoting "Jose Luis Marin Perez" <jolumape_al at hotmail.com>:
>>
>>>
>>>
>>> Thanks for your answers.
>>>
>>> These hardware features:
>>>
>>> ML370 G4
>>> Xeon 3.6 GHz CPU
>>> 1 GB RAM
>>> Hard Drive 300GB - Raid 1 - EXT3
>>>
>>> When accessing one of these accounts capture a sample of the TOP command
>>>
>>> top - 09:37:51 up 4 days, 15:26,  2 users,  load average: 5.07, 4.85, 4.79
>>> Tasks: 146 total,   1 running, 145 sleeping,   0 stopped,   0 zombie
>>> Cpu(s): 46.5% us, 19.8% sy,  0.0% ni, 19.8% id, 13.9% wa,  0.0% hi, 
>>>  0.0% si
>>> Mem:   1034512k total,  1008464k used,    26048k free,    55592k buffers
>>> Swap:  2048276k total,   143232k used,  1905044k free,   516016k cached
>>>
>>> On our server there are about 5000 mail accounts with more than 
>>> 1000 messages per account.
>>>
>>> As can enable an option _imp_hook_msglist_format and that benefits 
>>> could give me to solve my problem?
>>>
>>> Regarding the questions of Steve Devine:
>>>
>>> There are 3 webmails configured for accessing the IMAP server and 
>>> have approximately 200 to 300 concurrent users
>>>
>>> MAXPERIP = 256
>>> MAXDAEMONS = 40
>>>
>>> Thanks
>>>
>>> Jolumape
>>
>> Looks like your RAM is used up and your running into swap. Get more memory.
>> Is IMAP the only thing running on this machine?
>
> Note that he had 50% (~500MB) of the RAM used as file-cache which can 
> mostly be freed on demand. So i don't agree that RAM is the primary 
> problem here.

with 200-300 concurrent users having about 1000 email in their inbox, data for those concurrent sessions can't fit into 1G of RAM, no ?