Maxim, Can you clarify this Are you storing just the message id or the whole message in memory? Your help will be highly appreciated.
Thanks pradeep Fateev, Maxim wrote: > > It would be interesting to see some numbers about memory utilization per > message in backlog. > > IMHO the main problem with keeping references in memory is that it needs > recovery phase on broker startup. It can take a while when backlog is > really big. > > -----Original Message----- > From: James Strachan [mailto:[EMAIL PROTECTED] > Sent: Sunday, September 03, 2006 11:51 PM > To: [email protected] > Subject: Re: Paging support > > Note that MessageReferences != message contents; they are mostly just a > MessageId which is pretty small. > > On 8/29/06, Fateev, Maxim <[EMAIL PROTECTED]> wrote: >> AFAIK messages are moved from journal to permantent storage (JDBC) on >> every checkpoint. The problem is that references for every message are >> still kept in memory. >> IMHO it is inherent limitation of MessageStore API as it is defined now. >> The only way to get message is by id. And the only way to have id is to >> keep it in memory. >> I'm looking into changing MessageStore API to one that instead of >> >> Message getMessage(MessageId identity) >> >> Would provide >> >> Message getNextMessage() >> >> method eliminating need to keep references in memory. >> >> >> >> -----Original Message----- >> From: Anders Bengtsson [mailto:[EMAIL PROTECTED] >> Sent: Tuesday, August 29, 2006 1:23 AM >> To: [email protected] >> Subject: Re: Paging support >> >> >> >> gnodet wrote: >> > >> > If you don' t use any persistent store, messages must be kept in >> > memory, so you are obvisouly limited by the available mem. >> > >> >> Yes, this is what I would expect. >> >> >> >> > If you use a jdbc store, messages can be removed from memory and >> > store for later consumption. >> > >> >> Yes, except it doesn't actually work! >> >> It writes things to the store, but it is still very much limited by >> memory for some reason. (Someone reported this as AMQ-845 earlier, but >> with no response). >> >> -- >> View this message in context: >> http://www.nabble.com/Paging-support-tf2163517.html#a6034790 >> Sent from the ActiveMQ - User forum at Nabble.com. >> > > > -- > > James > ------- > http://radio.weblogs.com/0112098/ > > -- View this message in context: http://www.nabble.com/Paging-support-tf2163517.html#a6156162 Sent from the ActiveMQ - User forum at Nabble.com.
