Gabriella Davis 27 September 2010 16:56:22Over the past few months I've had several reports of customers with new 8.5 installs and online awareness problems. These have ranged from people "blipping" offline and online again to everyone appearing entirely offline. The commonality appeared to be the new Presence Subscription service which in many cases wouldn't start at all.
IBM have now acknowledged the problem and offered a suggested fix which has worked in cases we've tried so far. Basically the Presence Subscription has been designed to use 1024 kb of memory and that's simply too much resource on servers with less than 4GB RAM and a reasonable number of concurrent users. Of course since they support 32bit as an OS, that's any 32bit server with a reasonable number of concurrent users !
The fix should be to modify the sametime.ini file and replace this
STPresenceSubscriptionsMgr_VM_ARGS=-Xmx1024m -Xgcpolicy:gencon -Xcompactgc
STPresenceSubscriptionsMgr_VM_ARGS=-Xmx512m -Xgcpolicy:gencon -Xcompactgc
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