SSL performance optimization with cache

[justin]

Browsing my nginx error log noticed the following logged A LOT:

2012/12/13 21:37:18 [crit] 7968#0: ngx_slab_alloc() failed: no memory in SSL
session shared cache "SSL_CACHE"

If the cache fills, does it flush older entries for new entries? Basically,
how does the SSL cache work exactly?

Thanks.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,233990,233999#msg-233999