Memcached module -- unix domain socket support? (too many TIME_WAITs..)

Igor Sysoev is at
Fri Aug 1 10:33:11 MSD 2008

On Fri, Aug 01, 2008 at 02:27:55PM +0800, Chancey wrote:

> Maybe I/O is too high ? 
> Use memcached can avoid this .

Using local memcached means that all data can fit in memory, therefore
local filesystem data will be cached by OS VM and there will not be
high disk I/O.

> ?????? Re: Memcached module -- unix domain socket support? (too many TIME_WAITs..) 
> On Thu, Jul 31, 2008 at 09:54:03PM -0700, Kon Wilms wrote:
> > I have a pool of memcached servers running on localhost with
> > connection to nginx, feeding motion jpeg data out via static JPEGs to
> > a flash application. The load is pretty high on the server because of
> > this with each client running 3 GETs from memcached every second (i.e.
> > 3fps).
> > 
> > Nginx works fine, however, the problem I have is that thousands of
> > TIME_WAITs are created from the memcached GET requests, which I would
> > like to eliminate. I've already tuned the kernel but this has not
> > reduced it enough to handle a couple thousand viewers on the server.
> > 
> > Is there any way to connect nginx's memcached module to memcached via
> > unix domain socket or perhaps UDP, or any other ideas on how to fix
> > this problem?
> Adding unix socket support to ngx_http_memcached_module should be easy,
> but I'm not sure if memcached suppot unix sockets.
> BTW why do you serve local images from memcached ?
> It's better for both CPU and memory to serve them from local filesystem
> using sendfile.
> -- 
> Igor Sysoev

Igor Sysoev

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