I won't pretend to answer this question for you - but this is my guess..
>From what it looks like, this functionality performs a periodic check on the AR Server, to check for changes in definitions, and collects that information. This will in my opinion have some impact on performance. So as long as that interval is relatively high, and set in such a way that it occurs in periodic cycles when users are usually not online, it should be fine. My guess is that when this box is checked and the interval is defined, there is probably a definition check that happens that instant, followed next by the interval that is defined. So if this is done lets say at 11:00 PM when most users are usually offline in that time zone, and the interval is set for 86400 for the next check to happen at 11:00 PM the next night, you might not have too much to worry about. I would however not be comfortable doing it every few minutes, as it MAY impact the performance of that particular mid-tier server in that load balanced configuration.. Cheers Joe _____ From: Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of Brittain, Mark Sent: Thursday, October 10, 2013 4:34 PM To: [email protected] Subject: Another Mid-tier cache question Hi All, Is it safe to use Definition Change Check (Peform Check) with load balancers? When the dev and production ITSM servers were installed Perform Check was no selected. Don't know why it was done that way. Later when I applied a patch to the mid-tier servers, BMC Support said I should select Perform Check. I did this on the development server which has one ar server, one mid-tier and no load balancers, but did not select Perform Check on production which is a VIP > load balanced to two mid-tiers which are load balanced to two ars servers in a server group. Particularly with small changes I really like using change check/perform check on dev and would like to use on the production servers. Since I don't know why this was not originally set up that way I figured I would ask the group first. ARS 7.6.06 SP3 Mid-Tier 7.6.06 SP4 Thanks Mark _ARSlist: "Where the Answers Are" and have been for 20 years_ _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org "Where the Answers Are, and have been for 20 years"
