Using the Server Activity Monitor
The Caching Proxy's Server Activity Monitor displays server and network performance statistics, server and network status, and access log entries. The monitor can be used remotely and does not need to be on the same machine that is running the proxy server. The Server Activity Monitor is enabled by default and requires no configuration.
- In any connected web browser, enter the following URL, by using
your server's full name where indicated.
http:// your.server.name /Usage/Initial
- In the Configuration and Administration forms, select Server Activity Monitor.
The following sections show the type of information that the Server Activity Monitor provides, and suggest how to use the information to tune performance.
- Activity Statistics
- Network Statistics
- Access Statistics
- Proxy Access Statistics
- Cache Statistics
- Cache Refresh Summary
Activity Statistics
Activity Statistics | |
---|---|
Connections | 1 Active, 431 maximum |
Response time | Not available |
Throughput | 0 connections/second |
Requests processed today | 0 |
Total requests processed | 114 |
Request errors | 3 |
- Number of active threads—This specifies how many threads to use for server requests. You can increase or decrease the number of threads available, depending on how much memory you have. To change the number of active threads, in the Configuration and Administration forms, select Server Configuration –> Server Management –> Performance, or edit the MaxActiveThreads directive in the configuration file.
- Persistent connections—Whether the proxy allows persistent connections with a client can have an effect on network throughput. To change this setting in the Configuration and Administration forms, select Proxy Configuration –> Proxy Performance to enable or disable persistent connections, and select Server Configuration –> Server Management to define how to maintain the connections. To alter these settings by using the configuration file, see the reference sections for the following directives:
Network Statistics
Table 2 shows an example of the Network Statistics page.
Network Statistics | |
---|---|
Outgoing data: | 1 K bytes/second |
Incoming data: | 1 K bytes/second |
Bandwidth saved: | 3 K bytes (0 K bytes/second) |
Bandwidth saved today: | 0 K bytes (0 K bytes/second) |
The Network Statistics form provides information about the network the proxy is running on, including the data speeds for bytes sent and received.
Access Statistics
The Access Statistics page displays the 20 most recent entries in the access logs. This page displays recent entries in the Proxy Access log (in black type) and the cache access log (in blue type). You can customize what is displayed by customizing what is logged.
Proxy Access Statistics
- Use automatic cache refresh to increase the likelihood that a requested document is in the cache.
- Increase the minimum hold time for cached files.
- Do not cache files that are served from your local domain. Although this setting tends to decrease the number of requests that are served from the cache, there is no loss of performance if files are served from your local intranet as quickly as they are served from the cache (in some cases, it is faster).
Cache Statistics
- Whether the cache is operational or is being reindexed from a server start
- Whether garbage collection is running
- Cache hit rates
Cache Refresh Summary
- If most of the traffic on your intranet is not to local websites, consider disabling caching for the local domain.
- If many clients request a page that does not appear in the cache access log, you can manually configure the URL to be loaded.
- Adjust the number of URLs to preload.
- Specify the maximum time the cache agent can run.