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

[Chancey]

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

2008-08-01 



Chancey 



发件人： Igor Sysoev 
发送时间： 2008-08-01  13:49:26 
收件人： nginx at sysoev.ru 
抄送： 
主题： 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
http://sysoev.ru/en/
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