• RSS
  • Twitter
  • FaceBook

Welcome to ISAserver.org

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Help with the Cache Size

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [ISA Server 2004 Cache] >> General >> Help with the Cache Size Page: [1]
Login
Message << Older Topic   Newer Topic >>
Help with the Cache Size - 21.Jul.2006 9:23:38 PM   
rmharp

 

Posts: 49
Joined: 18.May2006
Status: offline
I need some input

My Setup:

2 Servers in NLB array

Server Specs:
Dual Proc Pentium 4 Xeon Duo's 2.8 Ghz
4 GB RAM
280 GB in RAID 5 array
Windows Server 2003 R2
and of course ISA 2k4

These two servers have to do Firewall/Proxy-Cache/VPN for a DS3 45Mbps connection.

Right now I have the cache size set to 40 GB per machine but I am wondering at what point is the size of the cache detrimental to the performance?  When will it be faster to actually go out to the Web and get the pages instead of searching through the cache for them?

Any help would be greatly appreciated.
Post #: 1
RE: Help with the Cache Size - 25.Jul.2006 3:17:42 AM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi RM,

Since the CARP array doesn't duplicate content, the entire array represents a single logical cache file.

I generally don't like to make the disk cache any larger than the amount of memory installed on the ISA firewall. For this reason, I rarely make the cache file larger than 4 GB.

HTH,
Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to rmharp)
Post #: 2
RE: Help with the Cache Size - 25.Jul.2006 8:41:29 AM   
denizyalcin

 

Posts: 122
Joined: 19.Jan.2005
From: Turkey
Status: offline
Hi Mr. Shinder,

Could you please provide us with some technical points about your consideration (or at least point us to some technical documents) ? I really would like to learn the inner workings of ISA 2004's caching function.

Thanks in advance

(in reply to tshinder)
Post #: 3
RE: Help with the Cache Size - 25.Jul.2006 5:31:48 PM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi Deniz,

Check out:
http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/bestpractices.mspx

Based on the considerations and calculations in that article, keeping the disk cache near the RAM limit is a good "gentlemen's" estimate.

HTH,
Tom



_____________________________

Thomas W Shinder, M.D.

(in reply to denizyalcin)
Post #: 4
RE: Help with the Cache Size - 25.Jul.2006 7:28:36 PM   
rmharp

 

Posts: 49
Joined: 18.May2006
Status: offline
Thanks for your help Tom.

Regards,

Ryan Harp

(in reply to tshinder)
Post #: 5

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [ISA Server 2004 Cache] >> General >> Help with the Cache Size Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts