test

Netra Proxy Cache Array User's Manual

Timeouts

To View or Modify Timeouts

  1. Click Timeouts in the Advanced Proxy Cache Configuration page. The page shown in Figure 4-9 is displayed.

    Figure 4-9 Timeouts Properties

    Graphic

  2. Under the Timeouts heading, enter or accept values for the following properties:

ICP Neighbor Timeout (sec)

The duration the Netra Proxy Cache Server waits for a response to an ICP query. Beyond the timeout you specify, the software gives up on the query target. The default value for this property is 2 seconds. You might consider increasing this value if the network connection between the local machine and a sibling is subject to delays.

Timeout for Server Connections (sec)

The maximum duration, in seconds, the server waits for a connection to be established. The default is two minutes. "Proxy Cache Connect Timeout and Parent Failover" for a discussion of the relationship to this property to the operating system's TCP connect timeout.

Read Timeout (min)

The duration beyond which the Netra Proxy Cache Server disconnects a connection on which no activity is occurring. The default value is 15 minutes.

Client Lifetime (min)

The maximum duration a client (browser) is allowed to remain connected to the cache process. This timeout prevents clients that go away without shutting down from consuming software resources. The default 200 minutes (3 hours, 20 minutes). If you have high-speed client connectivity or occasionally run out of file descriptors, you might want to reduce the default number.

TTL for Negative Caching of Objects (min)

The server caches the fact that a cache request failed (for example, the object identified by a specified URL cannot be found). This negative caching lasts for the number of minutes specified for this property. The default is five minutes.

TTL for Successful DNS Lookups (min)

The server caches the result of a successful host name lookup for the duration specified for this property. The default is six hours. Note that the proxy cache service does not observe the TTL specified in a DNS record.

TTL for failed DNS Lookups (min)

The server can cache the fact that a host name lookup failed. The default is zero minutes, which means that, by default, the server does not perform this type of negative caching.