We recently observed that when we restart our app/web server
(Tomcat/Apache), majority of the files in the cache directory (*.data
and *.index) are updated (<tomcat>/webapps/ars/cache). We have enabled
persistent cache option and have a few of the biggest forms in
pre-fetch.

 

1. For forms mentioned in the prefetch xml, am I correct in assuming
that :

a. these are fetched when I start/restart the app/web server AND the
other forms (i.e. those not mentioned in the prefetch xml) are not
fetched? 

b. The forms not mentioned in the prefetch are fetched only when a user
tries to access the forms and its out-of-date (assuming Enable check is
switched on)?

 

2. Is there any way in which we can tell the app/web server not to fetch
forms (either mentioned in prefetch or not) when we restart the app/web
server? We would like it to use what data it already has in the cache
directory before it was restarted, rather than it fetching the forms
from the server again after its restarted.

 

3. What is the purpose of the USERNAME in the prefetch xml? Should only
an admin username be defined here or will any ID do?

 

I skimmed through the documentation available, but was unable to get
clarity on the above.

 

ARS 7.1 patch 003 on solaris

MT 7.1 patch 005 on apache 2_2/tomcat 5-5.5.25

 

Thanks

Aravind

 

________________________________

From: "Easter, David" <[EMAIL PROTECTED]>
To: [email protected]

Sent: Wednesday, November 19, 2008 6:50:50 PM 


Subject: Re: Mid-Tier 7.1.0 Performance Issue -- Tomcat


** 

The use of persistent cache is so that you don't have to go fetch again
after the Mid-Tier is restarted.  

 

BMC Remedy Mid Tier performance (persistent cache)

In AR System 7.1, forms currently cached in memory can now be serialized
to a file, which enables these forms to be read back into memory when
the application server hosting the mid tier application is restarted
(after a normal shutdown).

 

Pre-fetch is for when the forms haven't yet been fetched.  It ensures
that the fetching occurs prior to the first request for the form.  That
way, users don't have to wait for the Mid-Tier to fetch the form - it's
already there and cached for them.

 

-David J. Easter

Sr. Product Manager, Solution Strategy and Development

BMC Software, Inc.

 

The opinions, statements, and/or suggested courses of action expressed
in this E-mail do not necessarily reflect those of BMC Software, Inc.
My voluntary participation in this forum is not intended to convey a
role as a spokesperson, liaison or public relations representative for
BMC Software, Inc.

 

 


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