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performance issue

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Occasional Visitor

performance issue

Hello,
We have a performance issue with our cluster related to (I think) DNS resolution. We're running TruCluster 5.1B pk2 on 2 DS25 and an EVA3000. The hardware is ok, there's no swapping. Looking at the cluster interconnect (ethernet gigabit cards), we found one card has many data overruns :
bcm0 Ethernet counters at Tue Feb 1 18:32:21 2005


1107279113 seconds since last zeroed
1710186658230 bytes received
11219315293106 bytes sent
19840466317 data blocks received
19652756688 data blocks sent
0 multicast bytes received
311376 multicast blocks received
0 multicast bytes sent
311422 multicast blocks sent
0 blocks sent, initially deferred
0 blocks sent, single collision
0 blocks sent, multiple collisions
0 send failures
10815943384 receive failures, reasons include:
10815943383 data overruns
1 frame check sequence errors

The other node has a lot less error on its bcm0 card. Could that be a configuration problem, or is it hardware ?
Many thanks
alex
4 REPLIES
Frequent Advisor

Re: performance issue

Hello Alex,
for my view this is a driver problem:
Tru64 V5.1B (PK2) has a bcm driver version of 1.0.14. You can verify this with
# sysconfig -q bcm |grep Version.
There are a lot of improvements and bugfixes
(including data overun problems) implemented since that version.
I recommend you to install the latest patchkit (PK4) and you will have 1.0.23
which runs fine.
regards, Frank
Valued Contributor

Re: performance issue

I'd try forcing your speed settings

ifconfig bcm0 speed xxxx (man page shows speed values)

Perhaps there is a duplex mismatch. What does "netstat -i" show you?

C
Occasional Visitor

Re: performance issue

okay.
We passed the lastest patches as recommended. That solved our performance problem due to data overruns on one ethernet card.
Occasional Visitor

Re: performance issue

We passed the lastest patches as recommended. That solved our performance problem due to data overruns on one ethernet card.
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