[horde] Memcache server questions

[Andrew Morgan]

On Wed, 12 Nov 2008, Steve Devine wrote:

> Yes as near as I can tell it did. The main page would display but you 
> couldn't get much further that that .. I know part of my problem is I just 
> don't have enough experience with memcache and this kind of high volume 
> traffic. My web servers were all pegged at 259 processes. That one issue .. I 
> think I have to compile apache to allow more servers. We are running quad 
> core machines with 8G ram.

Have you tuned memcached?  For example, memcached on Debian Etch has a 
default limit of 1024 connections.

When it hangs, you can use a simple PHP script to try connecting to 
memcached.  Here is an example:

<?php

$memcache = new Memcache;
$memcache->addServer('your.memcache.server', 11211);

$stats = $memcache->getExtendedStats();
print_r($stats);

?>


Which outputs something like:

Array
(
     [<hostname hidden>:11211] => Array
         (
             [pid] => 2687
             [uptime] => 19315200
             [time] => 1226696232
             [version] => 1.1.12
             [rusage_user] => 8658.041093
             [rusage_system] => 37976.749398
             [curr_items] => 1220724
             [total_items] => 282816582
             [bytes] => 1761613110
             [curr_connections] => 18
             [total_connections] => 63174125
             [connection_structures] => 310
             [cmd_get] => 307832563
             [cmd_set] => 322203131
             [get_hits] => 214949247
             [get_misses] => 92883316
             [bytes_read] => 3827998958223
             [bytes_written] => 3848990513185
             [limit_maxbytes] => 2147483648
         )

)


 	Andy