2 slow CARS on Node2 nodes for a particular workload

Hi all

Platform: Oracle Server Ent. Ed. 11.1.0.7 on AIX 5.3 64-bit ML10, Power5, 2 RAC nodes.

Workload: consists of queries and DML for application server in the same network as DB server, via the thin driver JDBC.

When the load test to the foregoing, flow to node 1 is good while node 2 is poor. As revealed by the ADDM, node 2 has much DB of time devoted to the event "SQL * Net more data from client" and this does not happen on node 1. Apart from this event, the two nodes have similar performance.

The load test above is then performed again by stopping the DB on nodes and route the entire load to the remaining DB node. The result is always the same (i.e. the node 2 is slow).

The load test is performed once again with the connection string changed to point to one of the nodes/instances at the same time. Node 1 works even better than the node 2.

To isolate the problem, a workload only small insert is subject to nodes but this time, the performance is the same on both nodes.

The response time of ping and traceroute both public and VIP addresses from the application server is the same.

Have you encountered similar problem? What is the best method to insulate, either a network or a problem with Oracle? In fact, I raised a SR, and support of Oracle responded that the database was healthy.


Thank you and best regards,

Lawrence man

Bargaining issues automatic switch port?

Try the LAN cables to the public net tour between 1 and 2 and see if the problem goes away.

Tags: Database

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