[rabbitmq-discuss] limit number of messages buffered in memory in new persister

Sat Mar 6 01:56:25 GMT 2010

Tsuraan,

> What client are you using?  If it's the python amqplib, can you try
> putting this line:
> self.sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 0)

Thanks for the suggestion!  We are using rabbitmq-c.  I tried setting (TCP_NODELAY, 1) and the troughput increased from 20 msg/sec to 200 msg/sec.  As Tony pointed out in the previous email it was indeed caused by nagling.   it did not happen to tx_select but it happened to tx_commit.

Many thanks to everyone who helped on this thread!  it is greatly appreciated!

-alex