System perforamance 4.x vs. 5.x and 6.x

[Kris Kennaway]

Brett Bump wrote:

> I've changed the order of php extensions, disabled autonegotiation,
> moved mail queues and large volume directory folders to separate
> drives and set noatime.  Nothing seems to make much of an impact.
> My next idea was to setup my kernel for device_polling, but none of
> this is really diagnosing what the real problem is.  Any clues?

We are going to need more information about your system.  What do you 
mean by "peak activity"?  What is running on the system when it performs 
badly (check top -S, ps, gstat, vmstat -w, vmstat -i).  What is your 
kernel configuration, dmesg and relevant aspects of the system 
configuration?

Kris