Hello, I use around 100 collections without problem but here are sentences from someone from CA you should be aware of:
" When you get a large number of Global Collections / Global Hierarchy Collections you can reach a point that you exceed the monitoring periodicity and start alarming on Global Collections engine----see the TS article below. GLOBAL COLLECTION CPU THRESHOLD EXCEEDED SYMPTOMS: Less-than optimal SpectroSERVER performance, abnormally disconnected clients, and slow response times. PROBABLE CAUSES: A Global Collection update has taken a longer-than-normal amount of CPU time, which might be contributing to the above symptoms. RECOMMENDED ACTIONS: 1) Gauge the severity of the performance impact by looking at how long the GC update took( see the event ). If it took 5010ms and the threshold is 5000ms, then there is minimal impact... ), and how many occurrences there are. 2) Optimize Global Collection search criteria. It is important to try and narrow down the scope of the search using simple comparison on simple attributes. Order is important, as the criteria is processed top-down. String comparisons and comparisons on calculated attributes can be expensive, if the comparison needs to be done across a large number of models. It is usually best to first limit the scope of the search by using model-class or model-type criteria. See the associated event for details. 3) If you only occasionally see this alarm, it is probably just an anomaly and should be cleared. You can also increase the "gc_perf_cpu_threshold" setting in the $SPECROOT/SS/.vnmrc to reduce the number of "false alarms". The default setting is 5000 milliseconds, and can be increased as needed to baseline performance e in your particular SPECTRUM environment. 4) If this Global Collection contains external attributes, the CPU time calculation may not accurate and this could be a false alarm. You may want to disable this alarm by modifying the EventDisp entry for Event00010f20." Kind regards, ___________________________________________________________ Jonathan Rousseaux Operations Support - Network and System Management Axa Tech NESD Postal Address: Bd du Souverain, 25 - B-1170 Bruxelles, Belgium Int.Post: W04/687 Visitors Address: Avenue Marcel Thiry, 208 - B-1200 Bruxelles, Belgium [email protected] Tel. : +32 2 62 29 045 - Fax : +32 2 62 29 110 AXA redefining / standards Please consider the environment before printing this message -----Original Message----- From: Brett Davis [mailto:[email protected]] Sent: Tuesday, February 10, 2009 7:52 PM To: spectrum Subject: [spectrum] Number of Global Collections? How many global collections are most people using in Spectrum, and is there a recommendation as an upper limit on that number, given that they are for the most part dynamic collections? We are thinking about undertaking a Spectrum re-organization project which essentially mean the addition about a significant number of Global collections (potentially around 1000, or 5 per building on campus). We would then remove the global collections view from most people's permissions and just give them the Hierarchical view of the global collections to make it manageable. I'm concerned that this may be too many for Spectrum to easily handle, and I was wondering if anyone else had any experience with large numbers of collections. Thanks for any feedback. -- Brett Davis IT Network and Security Operations Cisco Certified Network Associate (CCNA) Purdue University YONG 605 Phone (765) 49-62304 [email protected] --- To unsubscribe from spectrum, send email to [email protected] with the body: unsubscribe spectrum [email protected] -----Disclaimer----- This message may contain confidential information intended solely for the use of the named addressee. If you are not the intended recipient, you should not read, use, disclose or reproduce the content of this message. If you have received this message by mistake, please notify the sender immediately. Any views or opinions presented in this message are solely those of the author and do not necessarily represent those of AXA Belgium, AXA Bank Europe, AXA Tech Belgium GIE - ESV or any other entity of the AXA Group, unless otherwise stated by the sender and duly authorized by the said companies. --------------------- --- To unsubscribe from spectrum, send email to [email protected] with the body: unsubscribe spectrum [email protected]
