Event ID 14193 When You Configure the Percentage of Free Memory to Use for Caching (823075)

SYMPTOMS

When you configure the Percentage of free memory to use for caching option on the Advanced tab of the Cache Configuration Properties dialog box, the following event appears in the application log of Event Viewer:Source: Microsoft Web Proxy
Category: None
Event ID: 14193
Date: date
Time: time
User: N/A
Computer: servername
Description: The Cache was initialized with less memory than configured. This is because there is not enough free memory available for ISA Server caching.

CAUSE

This issue occurs if both of the following conditions are true:

You have 4 gigabytes (GB) or more of random access memory (RAM) installed in the computer.

-and-
You configure a percentage of free memory to use for caching that corresponds to more than 2 GB of RAM.

When you try to allocate more than 2 GB of memory, this operation is unsuccessful because the amount of memory is greater than the maximum User mode memory size of 2 GB.

MORE INFORMATION

The event that is described in the "Symptoms" section of this article indicates that the Microsoft Web Proxy service (W3proxy.exe) cannot successfully allocate the memory cache that you configured in the Cache Configuration Properties dialog box.

For example, if you have a computer with 4 GB of RAM, and you try to configure 80 percent of free memory to be used for caching, the Microsoft Web Proxy service tries to allocate 3.2 GB of RAM to the cache (4 GB x 80 /100 = 3.2 GB). Because this exceeds the maximum User mode memory size of 2 GB, this memory allocation operation is unsuccessful.

If the amount of memory that is requested is not available, Internet Security and Acceleration (ISA) Server uses an adaptive algorithm that tries to configure a progressively smaller memory cache until the operation is successful. This is to prevent the Microsoft Web Proxy service from not starting because of a user configuration error. To view the actual amount of allocated memory for the cache, start the Performance tool, and then load the ISA Server Cache Performance Monitor counters in System Monitor.

On computers with 4 GB of RAM or more, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Server Datacenter Edition, Microsoft Windows Server 2003 Enterprise Edition, and Microsoft Windows Server 2003 Datacenter Edition offer the 4-GB RAM tuning feature. This feature permits processes to benefit from more than 2 GB of RAM in the User mode space. To enable this functionality, add the /3GB switch to the Boot.ini file on the server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

291988 A Description of the 4 GB RAM Tuning Feature and the Physical Address Extension Switch