Sync cache is disabled/grayed out so the only option I have is Flush Cache.

________________________________
From: Action Request System discussion list(ARSList) [arslist@ARSLIST.ORG] On 
Behalf Of Joe D'Souza [jdso...@shyle.net]
Sent: Thursday, October 10, 2013 5:13 PM
To: arslist@ARSLIST.ORG
Subject: Re: Another Mid-tier cache question

**

Like LJ said its best left off on production as your changes to Production if 
your company follows a proper change process is minimal. And you Sync the cache 
whenever there is a genuine change in the cache.



Joe

________________________________
From: Action Request System discussion list(ARSList) 
[mailto:arslist@ARSLIST.ORG] On Behalf Of ravi rai
Sent: Thursday, October 10, 2013 5:07 PM
To: arslist@ARSLIST.ORG
Subject: Re: Another Mid-tier cache question

LJ,
We do Quarterly releases.After each release we do manual flush Cache .
Is is safe to turn this option off.
It might resolve cache corruption issues which we encounter almost every 
alternate week

Ravi

________________________________
Date: Thu, 10 Oct 2013 14:57:48 -0600
From: lj.longw...@gmail.com
Subject: Re: Another Mid-tier cache question
To: arslist@ARSLIST.ORG

**
Mark,
I agree with Joe....but look at it this way....this check box tells the 
Mid-Tier server to periodically check your Remedy server for definition 
changes.  How often are definition changes made in your production 
server?....Weekly?  Monthly?  Quarterly?  You likely don't need an automated 
'check' to be turned on in production as it doesn't change very often...and 
when it does, you can manually hit the 'sync' button.

Regarding the app server being behind a load balancer...no, that won't affect 
things because regardless of which app node the mid-tier gets the cache from, 
it should be 'correct' :)

On Thu, Oct 10, 2013 at 2:45 PM, Joe D'Souza 
<jdso...@shyle.net<mailto:jdso...@shyle.net>> wrote:
**
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:arslist@ARSLIST.ORG<mailto:arslist@ARSLIST.ORG>] On Behalf Of Brittain, 
Mark
Sent: Thursday, October 10, 2013 4:34 PM
To: arslist@ARSLIST.ORG<mailto:arslist@ARSLIST.ORG>
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
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