Few things that may help understanding your problem: 1. What is the status of your slabs allocation, is there enough room to all slabes ? 2. Do you see increase in the requests rate when your Memcached memory is becoming full with objects ? 3. How many threads are configured ?
On Tue, Jul 17, 2012 at 1:11 PM, David Morel <david.mo...@amakuru.net>wrote: > hi memcached users/devvers, > > I'm seeing occasional slowdowns (tens of milliseconds) in setting some > keys on some big servers (80GB RAM allocated to memcached) which contain > a large number of keys (many millions). The current version I use is > 1.4.6 on RH6. > > The thing is once I bounce the service (restart, not flush_all), > everything becomes fine again. So could a large number of keys be the > source of the issue (some memory allocation slowdown or something)? > > I don't see that many evictions on the box, and anyway, evicting an > object to make room for another shouldn't take long, should it? Is there > a remote possibility the large number of keys is at fault and splitting > the daemons, like 2 or more instances per box, would fix it? Or is that > a known issue fixed in a later release? > > Thanks for any insight. > > David Morel > -- Yiftach Shoolman +972-54-7634621
