I am using same 2 web server & 2 master slave DB server configuration for my wordpress installation (72 GB RAM) along wit load balancer.
Also added hyperdb and w3TC. still I am getting Fatal error: Out of memory.....
I am getting error in hyperDB line no. 207 i.e. for ltrim(). I am not sure why there is error. I set memory_limt as 180M in php.ini
Is this issue with hyper DB? In my DB there are total 20000 posts and 24000 TAGS i.e. tags are more than post.
Is this issue related with hyper DB or with DB?
How we can calculate php script size?