NFS with AIX-4.2

[H.Merijn Brand (procura]

Ever since December patches are installed on our HP-UX 11.00 boxes (comming from the September patches) communication over NFS with AIX-4.2 has decreased performance considerably in both directions. AIX 4.3 has no problems. AIX-4.2 is also at the latest available patch level.

Hoping newer patches might have solved this problem already, I installed PHKL_25237, PHKL_25813, PHKL_26059, PHNE_24909, PHNE_25116, and PHNE_25423. But these did not bring me back to the performance of before the December patches.

Useful ideas?

[harry d brown jr]

Procura,

Have you tried using the custom patch manager to determine what other patches might be suggested? Especially network and IO patches.

live free or die
harry

[H.Merijn Brand (procura]

Yes I did.

22566 suggests 25116 which is a spinoff of 24099, 23121, and 22381

21767 suggests 25423 which is a spinoff of 25135, 24715, and 24289

24909 mentioning biod is mentioned in a lot of other patches, so it might be an important one :)

25525 mentions 25906 both not yet installed, so could be tried. But I don't /like/ reboots. I try to avoid annoying other users as much as possible, and the description didn't sound to much as a solution.


Others are 25237 (installed), 24082, and 18543 (both not installed).

[Krishna Prasad]

Are any of the servers using Token-Ring? There is an issue with MTU size configuration when using NFS.

[H.Merijn Brand (procura]

No token ring. All 10/100 ethernet

But why should MTU have changed installing the December patches? And why only AIX-4.2? HP-UX 10.20, HP-UX 11.00 and AIX-4.3 all act as expected.

Any area where NFS related MTU settings can be checked?

[Krishna Prasad]

under advanced settings on the card you can find mtu sizes. The problem is usually with Token-Ring because it has had different default values. I have not seen the problem with Ethernet because the default size has been very consistant at 1500.

[H.Merijn Brand (procura]

Indeed 1500 on all cards.