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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » tcpNoDelay paremeter on HTTP Request Node

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OtisFly
PostPosted: Tue Aug 11, 2009 7:35 am    Post subject: tcpNoDelay paremeter on HTTP Request Node Reply with quote

Novice

Joined: 01 Dec 2005
Posts: 19
Location: London - UK

Hello
I'm using WMB 6.1 on Solaris 10. We are doing some webservice request via HTTP Request Nodes that were not performing as we would expect. We have set the tcpNoDelay parameter for the execution group in question to be true using:-

mqsichangeproperties <BrokerName> -e <ExecutionGroupName>
-o ComIbmSocketConnectionManager -n tcpNoDelay -v true

The broker has been restarted and when I run
mqsireportproperties <BrokerName> -e <ExecutionGroupName>
-o ComIbmSocketConnectionManager -r

the response is the following (I've blanked out host names and IP addresses):-

ComIbmSocketConnectionManager
uuid='ComIbmSocketConnectionManager'
userTraceLevel='none'
traceLevel='none'
userTraceFilter='none'
traceFilter='none'
maxSocketAge='4'
maxKeepAliveRequests='90'
resetCollectionStatistics=''
tcpNoDelay='TRUE'
tcpNoDelaySSL='Platform Default'
SocketConnections
host='xxxx'
port='9081'
collectionUseCount='14'
totalSockets='12'
totalBytesSent='16081'
totalBytesRecv='44698'
totalChunksSent='42'
totalChunksRecv='29'
OpenSocket
ip='nn.nnn.nnn.nnn'
secure='FALSE'
created='2009-08-11 11:26:45.122752'
lastUsed='2009-08-11 11:26:47.941975'
bytesSent='3362'
bytesReceived='5726'
chunksSent='6'
chunksReceived='4'
useCount='2'
state='Connected'
tcpNoDelay='FALSE'
SocketConnections
host='xxxx'
port='80'
collectionUseCount='12'
totalSockets='11'
totalBytesSent='18146'
totalBytesRecv='26122'
totalChunksSent='36'
totalChunksRecv='25'
OpenSocket
ip='nn.nnn.nnn.nnn'
secure='FALSE'
created='2009-08-11 11:27:40.352672'
lastUsed='2009-08-11 11:27:45.834343'
bytesSent='1547'
bytesReceived='1409'
chunksSent='3'
chunksReceived='2'
useCount='1'
state='Connected'
tcpNoDelay='FALSE'

I'm confused as to why the open sockets seem to have the tcpNoDelay set to FALSE rather than TRUE. These connections were started after the broker restart and from within the execution group that I changed. I'm wondering if the call to the services is thus still be done with the tcpNoDelay set to FALSE.
Any ideas why this is, and what I can do to change it.?
Thanks
Otis
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mgk
PostPosted: Thu Aug 13, 2009 2:35 am    Post subject: Reply with quote

Padawan

Joined: 31 Jul 2003
Posts: 1642

Hello. What you posted above shows that although the SocketManager is configured to set nodelay, the setting of it on the individual sockets did not take for some reason. You can try to force noDelay on the whole machine with ndd -set /dev/tcp tcp_naglim_def 1 and see if that helps or you could raise a PMR to find out why the setting did not stick.

Kind Regards,
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MGK
The postings I make on this site are my own and don't necessarily represent IBM's positions, strategies or opinions.
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