hi,

im trying to figure out what exactly is the performance hit of using message groups in the server.

to be more percise, im trying to figure out if having a LOT of different message groups have some impact on performance / memory consumption.

my issue is this: i have some messages that i need to process in a serial fashion, because the order is important. but, they are sparse, and i cant control when they will be delivered. i solved this problem using message groups by assigning each such group it's unique group id.

but each group will probably be the size of 3-4 messages tops, and most likely groups ids are unique.

i guess hornetq must save some kind of table to remember each group, and it's assigned consumer ,so i guess in my case this table will get quite large very quick.

is there a way to control this list, or at least flush once in a while the groups i longer use?

what is the correct approach of using message groups for this kind of use case?