Memcached and Memcache

[pegasus]

From nginx logs, many many times:

[error] XXXXXX: *XXXXXX readv() failed (104: Connection reset by peer) while reading upstream

PHP-FPM logs showed nothing out of the ordinary. After all, it was just closing and opening child processes as it was expected to do as needed or when they became stale.

These errors always occurred at the same time the browser proclaimed Error 337 (net::ERR_SPDY_PROTOCOL_ERROR). I was able to reproduce this issue many times per hour personally (honestly I don't know if anyone else ever encountered the issue), but it resulted in partially rendered pages, often with absolutely no text content (just styled backgrounds and empty divs). It was only after disabling fast-shutdown that both the readv() and Error 337s stopped instantly.

nginx 1.7.4 w/ SPDY + PHP-FPM 5.5.15 (at the time) w/ Zend Opcache 7.0.4 dev

I only thought to look at the Zend Opcache configuration because it seemed I only started noticing the issue within a few days after enabling Zend Opcache (around that time I had also enabled SPDY).

 

[eva2000]

maybe related to Google Chrome disabling SPDY for a week or so for some tests https://community.centminmod.com/th...emporarily-disabled-google-spdy-support.1094/ ?

if you re-enable fast shutdown now, do the errors come back ?

 

[pegasus]

Re-enabled fast shutdown. Has not caused any visible issue where the pages don't render fully. So I suppose the Error 337 was Google's fault from whatever they were changing in Chrome or SPDY last week. However, looking at the nginx logs, the readv() errors have returned. So I would say that fast shutdown still has an effect on communications between FCGI and Nginx. I'll be leaving it disabled until I see something about it in the PHP changelogs in a future PHP release.

 

[Moshe1010]

Is there a way to determine how much RAM memcached consumes?

 

[rdn]

Is there a way to determine how much RAM memcached consumes?

https://code.google.com/p/phpmemcacheadmin/

Here's what I'm using: http://livebookmark.net/journal/2008/05/21/memcachephp-stats-like-apcphp/

 

[Moshe1010]

Thanks