php and values not returning from memcached

[sjohnsonlist@feedster.com]

Hi Richard,

I've had the same results with 1 or 3 and with many different settings of
available memory.  There are other processes that are contributing to
memcache so that explains the difference in the total #s but none are
using a key style like this (I grepped the source code to make sure).

The flush_all failing is bothersome since that's supposed to be an
absolute thing at least according to Brad's docs.

Scott

> Scott,
>
> Have you tried working with just one memcached server?  The stats you show
> look good (total_items = cmd_set), but don't match the number of items you
> put in the cache.
>
> toast
>
> On Wed, 2 Jun 2004 sjohnsonlist@feedster.com wrote:
>
>> Hi all,
>>
>> Note: 1st post here so please excuse obvious stupidity but I did read
>> through the api docs and server docs w/o seeing anything.
>>
>> I'm running memcached across 3 servers on gentoo linux, kernel 2.6.5
>> environment (400 megs ram, 100 megs ram, 300 megs ram).
>>
>> What I'm doing is writing a cache loader to pre-populate a cache of data
>> pulled from a mysql table.  And what I'm finding is that caching a large
>> number of items is leaving a handful without values.
>>
>> My code is using the php API from this:
>> http://www.danga.com/memcached/dist/php-memcached-1.0.10.tar.gz
>>
>> Basically all I do is loop over my database and call $memc->set($key,
>> $value, $expire) and then kill the job if $memc returns false.  It never
>> dies so memcache seems to be accepting all my objects fine.  That works
>> fine and here's my internal diagnostics at the end of the job:
>>
>> Total size = 10795847 (this is the sum of the string lengths I loaded)
>> 22734 total objects loaded (this is the total # of keys I sent to
>> memcache)
>>
>> Now when I go to retrieve the content, I get this result:
>>
>> Key=|raw_content_47519384|
>> err=No value found for key raw_content_47519384
>>
>> But I know this was set correctly or my code would have died (and my
>> logs
>> show it was set correctly).  My guess is that objects are being expired
>> from the cache as new objects come in but I am setting a 5 day
>> expiration
>> time as measured by a time() + (5*86400) value. And this doesn't seem to
>> be enough data to overflow a cache of this size.
>>
>> Here are my stats from the server:
>> stats
>> STAT pid 25901
>> STAT uptime 503
>> STAT time 1086201062
>> STAT version 1.1.9
>> STAT rusage_user 0:118981
>> STAT rusage_system 0:190970
>> STAT curr_items 4395
>> STAT total_items 4395
>> STAT bytes 2498844
>> STAT curr_connections 1
>> STAT total_connections 5094
>> STAT connection_structures 4
>> STAT cmd_get 697
>> STAT cmd_set 4395
>> STAT get_hits 498
>> STAT get_misses 199
>> STAT bytes_read 2454699
>> STAT bytes_written 338016
>> STAT limit_maxbytes 524288000
>> END
>> flush_all
>> ERROR
>>
>> Interestingly I'm finding that the flush_all command isn't working.
>> That
>> feeds very, very wrong.
>>
>> Comments ?  Thanks in advance.
>>
>> Scott
>>
>>
>>
>>
>>
>>
>