Tuning SYSVR3 (Esix Rev D) (LONG!)

[Lyle Seaman]

cpcahil at virtech.uucp (Conor P. Cahill) writes:

>In article <N7970K8 at xds30.ferranti.com> karl at ficc.ferranti.com (Karl Lehenbauer) writes:
>>Anyone have any idea how to reduce these sluggish periods without reducing
>>the cache size and without reducing the reliability of the file system
>>with respect to power outages or the performance?


[ ... re MAXTOUP ... ]

>Even if you set this variable to some high value, it is still possible 
>that at that new time period following a large disk update, the system 
>will slow down momentarily due to many dirty pages that still need to 
>be written out, so you may be in a no-win situation.

On the other hand, the longer you keep them around, the greater the
likelihood that they will be changed again.  You've just saved a flush.

Rule #1 of performance optimization:  "Don't do it."
Rule #2 of performance optimization:  "Do it later."


( "it" doesn't mean performance optimization...)

-- 
Lyle                      Wang             lws at comm.wang.com
508 967 2322         Lowell, MA, USA       uunet!comm.wang.com!lws
             The scum always rises to the top.