PHP Client Hangs Apache: Any Ideas?
chris-lists at bolt.cx
Wed Mar 16 13:43:16 PST 2005
> I'd like more info on this, this has never once occured for me and we
> use persistent connections in production. If you could provide a
> scenario that helps reproduce this I would certainly work to fix it.
Well, to clarify, I'm using the pure PHP client. It's certainly not the
most reproduceable bug. When I was experiencing it, it would only happen
on one of six web servers at a time. I think it's caused by a php script
not finishing correctly, leaving the persistent connection in an
undefined state, so that the next time the connection is used it blocks.
It's been months since I disabled persistent connections though, so this
is all from memory.
> As to Greg's issue, we had a couple additional emails off list. I think
> part of the problem may be that he is running memcached on 2.4.x linux
> kernels using select() as the polling method. We have found memcached
> to be unreliable when using select() and to slow down immensely
> sometimes hanging, but to run perfectly with epoll under 2.6.x.
We're using epoll on 2.6.
More information about the memcached