Thanks Christian, that's all I needed. Cheers,
On 27 January 2014 16:56, Christian Posta <christian.po...@gmail.com> wrote: > Hi Bilgin > See inilne... > > On Fri, Jan 24, 2014 at 5:29 AM, Bilgin Ibryam <bibr...@gmail.com> wrote: > > Hi all, > > > > I have couple of questions regarding memory configurations. I read the > docs > > and couple of blog posts, but still cannot figure it out completely. > > > > In my case I have only persistent queues. > > > > 1. For memoryUsage, the docs say: "for non-persistent messages, specifies > > the maximum amount of memory used to hold the messages." Does it applies > in > > anyway for persistent messages too or to whole broker memory used too? Or > > is it only for non-persistent as the docs suggests? > Persistent messages that are cached in the broker when using > StoreCursor do count against the memory limit. These messages are > cached with the assumption that they are about to be dispatched to > consumers and its faster to pull from memory than pull directly from > disk to do the dispatch. By default, the highWaterMark set for these > cursors is 70%. So until 70% of memory of the queue is used, it will > continue to cache messages. > > > > > 2. For persistent messages, I have memoryLimit set per destination basis. > > Do I need to consider what is the memoryUsage set in this case? I mean is > > there any relation between memoryUsage and memoryLimit, like memoryUsage > >= > > memoryLimit x number_of_queues > > > Yes, the relationship you noted is more or less correct. If you > specify X for a system wide limits and you have N queues, then you > want to keep the sum of N queues' memory limits lower than overall > system limits. > > > 3. If I have 3gb for the broker JVM, can I assume it is safe to use 70% > of > > that for the queues, for example by giving 200mb per destination in total > > for 10 queues. And leave the remaining 30% (1gb) for the broker > > threads/consumers and so on. > This is probably okay, but there are no hard and fast rules on this > part. Just depends on threads, objects, are you running anything else > in the JVM, etc, etc. > > > > > Thanks > > > > > > > > -- > > Bilgin Ibryam > > > > Apache Camel & Apache OFBiz committer > > Blog: ofbizian.com > > Twitter: @bibryam <https://twitter.com/bibryam> > > > > Author of Instant Apache Camel Message Routing > > http://www.amazon.com/dp/1783283475 > > > > -- > Christian Posta > http://www.christianposta.com/blog > twitter: @christianposta > -- Bilgin Ibryam Apache Camel & Apache OFBiz committer Blog: ofbizian.com Twitter: @bibryam <https://twitter.com/bibryam> Author of Instant Apache Camel Message Routing http://www.amazon.com/dp/1783283475
