total used free shared buffers cached Mem: 1024 1020 3 0 0 859 -/+ buffers/cache: 160 863
With 863 "free" for programs, everything is getting memory issues. All webpages have
Warning: Unknown: Unable to allocate memory for pool. in Unknown on line 0
How can I figure out what the hell is eating up 859mb of memory in the cache and free it up?
I'm using nginx with php-fpm and mysql.