<div dir="ltr"><div><div><div><div>Dear all, <br><br></div>As promised after some time, here my feedback: We changed the prefetch count on our shovels to 1000. Since then we observe that our Shovels are running not nececesarrily faster (not expected) but for sure much more stable. <br>
<br>Two observations we made: <br></div>- If no prefetch count is set, and we have a lot of "unacked" Messages, which are currently residing inside the shovel, a connection loss from the shovel to the destination broker, can cause the whole source broker to crash (and all messages are lost if not persisted)<br>
</div>- It seems that messages in "unacked" State in the Source queue cannot be paged to disk in case of high memory usage. <br><br></div>Thanks again for your advice!<br><br>Cheers, <br>Claire<br><div><div><div>
<div><div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-02-27 16:25 GMT+01:00 Claire Fautsch <span dir="ltr"><<a href="mailto:cfautsch@goodgamestudios.com" target="_blank">cfautsch@goodgamestudios.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Great, Thanks for your valuable comments. <br><br></div>We will for sure try this out, and I will provide some feedback on the outcome. <br>
<br></div>Cheers, <br>Claire<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">2014-02-27 14:21 GMT+01:00 Simon MacMullen <span dir="ltr"><<a href="mailto:simon@rabbitmq.com" target="_blank">simon@rabbitmq.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 27/02/14 12:50, Jason McIntosh wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
SO I HIGHLY recommend setting a prefetch that's not unlimited if<br>
you're doing WAN replication,<br>
</blockquote>
<br>
So do I. Maybe we should change the default. Hmm.<br>
<br>
Cheers, Simon<span><font color="#888888"><br>
<br>
-- <br>
Simon MacMullen<br>
RabbitMQ, Pivotal<br>
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