From: Brewer, Edward \(NIH/OD\) (BREWERE@OD.NIH.GOV)
Date: Mon Jul 21 2003 - 07:53:05 EDT
Admins,
I have a question concerning network performance tuning. I have a
GS160 running 8 processors (2 QBB's) 16 Gb of memory, TRU64 5.1a patch kit
3, one ee0 interface card (set at 100 full).... The system runs one oracle
9i OLTP database. For the longest time network performance has been steady.
Lately it appears sluggish... I have a script that reset the netstat
counters every night and mails to me the previous day. Below you will find
the output for TCP from yesterday...a weekend..where I expect that network
traffic should be lighter. Do these seem abnormal...In particular the
number of window update packets, is that a high number or ratio?
Thanks,
Lee Brewer
46018183 packets sent
45902635 data packets (63331274344 bytes)
1845 data packets (1865526 bytes) retransmitted
51275 ack-only packets (27860 delayed)
0 URG only packets
53 window probe packets
43892 window update packets
18576 control packets
14744154 packets received
8868600 acks (for 63331354013 bytes)
12721 duplicate acks
0 acks for unsent data
3036247 packets (1063903951 bytes) received in-sequence
565 completely duplicate packets (65580 bytes)
0 packets with some duplicate data (0 bytes duped)
5837 out-of-order packets (175578 bytes)
0 packets (0 bytes) of data after window
0 window probes
5453784 window update packets
7 packets received after close
1 discarded for bad checksum
0 discarded for bad header offset fields
0 discarded because packet was too short
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