[SunHELP] [Ssa-managers] [Q] How to setup "newfs" on T3 arrary for performance?

[L]

We have T3 array (18GB X 9, RAID 5) connect to E280 (Solaris 8).  This
server is dedicate for ORACLE database (version 8.1.7).  The T3 array disk
space only for ORACLE data files (at least 5M, most of them are several
hundred MB).  the current setup for this T3 array file system is:

# mkfs -m /dev/dsk/c1t1d0s6
mkfs -F ufs -o
nsect=128,ntrack=64,bsize=8192,fragsize=1024,cgsize=13,free=1,rps=120,nbpi=8240,
opt=t,apc=0,gap=0,nrpos=8,maxcontig=128 /dev/dsk/c1t1d0s6 279191552

Someone suggest me re-config it and setup as:

newfs -m 1 -c32 -C64 -f8192 -n1 -i65536 -r10000 /dev/dsk/c1t1d0s6

for better performance on ORACLE and T3.


My questions are:


1. is "maxcontig=128" good enough ?

2. will -r10000 improve performance?

3. how -f8192 (frasize) affect performance?

4. how -n1 (nrpos) affect performance?

5. how -i65536 improve performance?

6. do I need change /etc/system parameter "maxphys" to higher value/

7. any other suggestion?


Thanks.

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