Created:
6/23/2006 8:46:49 PM

Author:
Przemek Radzikowski

permalink [Permalink]





International Careers & Jobs - An international employment directory, reviewing world-wide top job sites




  • Home  ›
  • Articles  ›
  • W3Proxy.exe high memory usage on ISA 2000 and SBS 2003



| More

W3Proxy.exe high memory usage on ISA 2000 and SBS 2003

Microsoft Small Business Server 2003 Premium Edition comes bundled with ISA 2000 firewall/proxy (w3proxy.exe). It is well know that ISA 2000 can cause excessive or high memory usage in its default configuration. This can be further compounded on SBS 2003 machines which run Active Directory, Exchange and SQL 2000 all on the same box.


 

 

I came across this problem recently when a Microsoft Windows Small Business Server (SBS) 2003 machine was running sluggishly. The SBS server had 3GB of RAM so it should be running quite smoothly; however inspecting the memory situation and running processes I discovered that W3Proxy.exe (ISA 2000 proxy) was using almost 900MB of RAM.

ISA 2000 (w3proxy.exe) out of the box and in its default configuration is setup to use 50% or available memory for caching. This is particularly problematic on machines with more memory because the more memory you have the more ISA gobbles up.

W3proxy.exe memory usage before optimizing ISA cache setting:

1. Open ISA Management console

2. Right click on Cache Configuration and select Properties, Click Advanced tab

As you can see the default setting for Percentage of free memory to use for caching is set to 50%.  This will allow ISA W3Proxy.exe to use 50% of available free memory, impacting on system performance.  W3proxy.exe can become quite problematic if not monitored - particularly on older systems.

If you don't have many users who rely on the caching ability or you're more interested on the speed of your server rather than W3Proxy performance then you can safely change the memory setting to 5%. 

W3proxy.exe memory usage after applying 5% setting:

We noticed a huge improvement in general server responsiveness after tweaking w3proxy.exe memory usage, without any noticeable degradation in proxy cache performance.

 

permalink [Permalink] - Updated: Monday, October 28, 2013





| More

 

Articles of Interest


International Careers & Jobs - An international employment directory, reviewing world-wide top job sites


 
 
(c) Capitalhead Pty Ltd
Contact Capitalhead About Us Articles & Publications Partners Solutions & Services Products Valid XHTML Valid CSS