Cache performance counters
Applies To: Forefront Threat Management Gateway (TMG)
The following table lists the performance counters for the Forefront TMG cache.
| Performance counter | Description |
|---|---|
Bytes Retrieved Rate from Disk Cache (KB/sec) |
The rate at which kilobytes of data are retrieved from the disk cache. |
Bytes Retrieved Rate from Memory Cache (KB/sec) |
The rate at which kilobytes of data are retrieved from the memory cache. |
Disk Cache Allocated Space (KB) |
The amount of space used for the disk cache (from the total disk space allocated for disk caching). |
Disk Failure Rate (Fail/sec) |
The number of I/O failures per second since the Firewall service started. An I/O failure occurs when Forefront TMG fails to read from or write to disk cache. |
Disk Write Rate (writes/sec) |
The number of writes to the disk cache, per second. |
Max URLs Cached |
The maximum number of URLs stored in the cache simultaneously since the Firewall service was started. |
Max URLs Cached |
Measures the maximum number of URLs that have been stored in the cache. |
Memory Cache Allocated Space (KB) |
The amount of space used for the memory cache (from the total memory allocated for memory caching). |
Memory Usage Ratio Percent (%) |
The amount of fetches from the memory cache, in proportion to the total fetches from the cache. |
Total Bytes Retrieved from Disk Cache (KB) |
The cumulative number of kilobytes retrieved from the disk cache. |
Total Bytes Retrieved from Memory Cache (KB) |
The cumulative number of kilobytes retrieved from the memory cache. |
Total Disk Failures |
The number of times since the Firewall service started that Forefront TMG failed to read from or write to disk cache, due to an I/O failure. |
Total URLs Cached |
The cumulative number of URLs stored in the cache. |
Total URLs Retrieved from Disk Cache |
The cumulative number of URLs retrieved from the disk cache. |
Total URLs Retrieved from Memory Cache |
The cumulative number of URLs retrieved from the memory cache. |
URL Commit Rate (URL/sec) |
The rate at which URLs are stored to the cache. |
URL Retrieve Rate from Disk Cache (URL/sec) |
The rate at which URLs are retrieved from the disk cache. |
URL Retrieve Rate from Memory Cache (URL/sec) |
The rate at which URLs are retrieved from the memory cache. |
URLs in Cache |
The current number of URLs stored in the cache. |