I need some help on troubleshooting an issue with the Mercury
LoadRunner. We are running a LoadTest with Mercury LoadRunner 7.8
against an RAC-enabled Oracle 11i (11.5.9) suite. This is a three-tier
architecture with three RAC nodes on the backend running Oracle
instances, administration and concurrent processing servers and one v880
server on the middle-tier running forms and Apache servers. Some of the
LoadRunner connections have been dropping with "Error in reading from
Socket or Server not responding". The middle tier has 6 CPU and 12GB RAM
and we are driving approximately 120 forms sessions. When the first time
this message appeared, I looked at "sar -u" and "sar -q" statistics and
discovered that the CPU idle was almost zero and the run-queue length
was b/w 12-14 with queue 100% full. This condition had sustained for
about 6-8 minutes and thereafter the CPU got released. The wait time
defined within the LoadRunnder is 2 minutes and I have been told by our
testing folks that if a LoadRunner virtual user connection is not
established during this period then the above message is encountered.
However, there a few drops in the later part of the afternoon where
neither the CPU was pegged nor the run-queue was full. If anyone has
seen this issue then could you please shared with me the reason under
what circumstances the LoadRunner terminates a connection with "Error in
reading from Socket or Server not responding" message.
Any help will be appreciated.
Thanks
Amir
--
http://www.freelists.org/webpage/oracle-l
Received on Fri Nov 11 2005 - 17:31:14 CST
