[CentOS] Centos/Linux Disk Caching, might be OT in some ways

>> Ah, well #1 on his list then is to figure out what he is running!
> 
> LOL, I know it sounds quite noobish, coming across like I've no idea
> what DBMS it is running on. The system currently runs on MySQL but
> part of my update requirement was to decouple the DBMS so that we can
> make an eventual switch to postgresql.
> 
> Hence the solution cannot be dependent on some specific MySQL functionality.


mysql's isam tables have a reputation for surviving just about anything 
and great builtin replication support...

postgresql less so (I suspect due to fake fsync/fsyncdata in the days 
before barriers) but maybe things have improved a lot nowadays.

Why are you switching?