we are using memcached for

[Brad Fitzpatrick]

Cool!

What libevent version and mode you using?  No weird delay problems like
most other people?

LiveJournal has a bunch of random tools to query the memcached stats (we
have 13 machines running, with 41 GB of memory) but nothing we can use
with Cricket or rrdtool.  Just live stats... and if you reload the stats
page, we memcache the stats you just saw, so we can show hit rate from the
last time you reloaded.  That's in CVS, if anybody wants it:

http://cvs.livejournal.org/browse.cgi/livejournal/htdocs/admin/memcache.bml

It uses the LJ wrapper API around MemCachedClient, though, so you'd have
to modify it a bit.

- Brad


On Fri, 17 Oct 2003, Glenn Plas wrote:

> Hi Brad,
>
> My name is Glenn, I'm working at tiscali.be and ISP.  First of all,
> memcache is the solution to all my problems(atleast the ones
> serverrelated).
>
> At the moment, we are running memcache to offload our mysql machines in
> different applications.  Since 2 weeks that I discovered memcached I
> have implemented this into various small but demanding application.
>
> we use it to: store mysql DB lookups from a URL rewrite script that used
> to do old/new url mapping.  This is working very very good and it has an
> incredible cache_hit rate as well.  Right now we hardly ever hit the DB
> anymore...
>
> We also use it in an inhouse application (together with fetchmail) to
> provide remote mail retrieval service, we like to call it 'GetMyMail'.
> It's using a negative cache + normal cache.  The negative cache lists
> the people that aren't a member of the service and the other lists the
> members that popped their mail in the last 5 minutes to prevent them
> from overloading the remote retrieval sessions.  Works quite good.  And
> what is more, my sql DB was parsing a 4 million queries per day at an
> during day average of 40q/s.  Now it's only 4 to 5 per second anymore ..
>
> Especially thanks to the expiration feature.  It drives all our stuff
> here now.  And the memory use is incredible low actually.
>
> This is all perl btw.  I'm planning to use memcache in php as well soon.
> btw, anyone interested in a perl script + rrd database functionality to
> graph the memcached stats easily ?  Still not finished but I allready
> have some nice stats being formed here.  If there is interest for some
> people, I will release it (after cleanup ;-)
>
> cheers again for the KISS concept and implementation.
>
> Glenn
>
> Glenn Plas
> Senior System Administrator
> Tiscali.be NV
>
>
>