RE: High "global cache blocks lost" statistics on one RAC node
- From: <Ravi_Kulkarni@xxxxxxxx>
- To: <racdba@xxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 7 Sep 2005 17:22:27 -0500
Amir,
Does your netstat -i list any non-zero values for RX-ERR / TX-ERR for
any of the nodes ?
Also netstat -s for UDP should have negligible errors. Check both
netstat -i & -s for BOTH instances. (Switches may vary with your *nix.
Following is on Linux)
$ netstat -i
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP
TX-OVR Flg
bond1 1500 0 16359630 0 0 0 16963867 0 0
0 BMmRU
$netstat -s
..
Udp:
12577981 packets received
162 packets to unknown port received.
0 packet receive errors
12466995 packets sent
..
Thanks,
Ravi.
________________________________
From: racdba-bounce@xxxxxxxxxxxxx [mailto:racdba-bounce@xxxxxxxxxxxxx]
On Behalf Of Hameed, Amir
Sent: Wednesday, September 07, 2005 3:38 PM
To: racdba@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: High "global cache blocks lost" statistics on one RAC node
I have a two-node RAC running an 11i-ebusiness suite (11.5.9/9.2.0.6
64-bit). I am seeing the following from Statspack:
Inst Statistic Total
per Second per Trans
----- ---------------------------------------- ------------------
-------------- ------------
1. global cache blocks lost 28
0.0 0.0
2. global cache blocks lost 4,410
2.7 0.9
We are using three giga-bit private interconnects going through a
switch. This does not see like an interconnect issue otherwise, I think,
I would have seen a higher number on the 1 node as well.
Any idea what might be causing it?
Thanks
Amir
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