timeouts

Description
The time duration until which squid waits for the reply from the origin server. If it exceeds this squid will respond with the error message “Connection timed out” to the client

Example
connect_timeout 180 seconds

Caution
Increasing the time here will lead to annoying of browser user.

Description
This parameter specifies how long to wait for a pending TCP connection to a peer cache. The default is 30 seconds. You may also set different timeout values for individual neighbors with the 'connect-timeout' option on a 'cache_peer' line

Example
peer_connect_timeout 45 seconds

Caution
Setting of peer_connect_timeout to more than 30 seconds will be a performance issue.

Description
Site select timeout is the timeout for URN to the multiple URLs selection. URN is a protocol designed for location-independent name resolution, specified in RFC 2169. This option configures the siteselect_timeout directive and defaults to 4 seconds. You do not need to change this.

Example
siteselect_timeout 6 seconds

Description
The read_timeout is applied on server-side connections. After each successful read(), the timeout will be extended by this amount. If no data is read again after this amount of time, the request is aborted and logged with ERR_READ_TIMEOUT. The default is 15 minutes.

Example
read_timeout 10 minutes

Description
This tag specifies Squid the time in seconds to wait for an HTTP request after connection establishment. For persistent connections, Squid will wait this long after the previous request completes

Example
request_timeout 20 seconds

Description
The maximum amount of time that a client (browser) is allowed to remain connected to the cache process. This protects the Cache from having a lot of sockets (and hence file descriptors) tied up in a CLOSE_WAIT state from remote clients that go away without properly shutting down (either because of a network failure or because of a poor client implementation). The default is one day, 1440 minutes

Example
client_lifetime 1000 minutes

Caution
The default value is intended to be much larger than any client would ever need to be connected to your cache. You should probably change client_lifetime only as a last resort. If you seem to have many client connections tying up filedescriptors, we recommend first tuning the read_timeout, request_timeout, pconn_timeout and quick_abort values. If the more file descriptors are in use then the memory in use will also increase, which is also a performance issue.

Description
Some clients may shutdown the sending side of their TCP connections, while leaving their receiving sides open. Sometimes, Squid cannot tell the difference between a half-closed and a fully-closed TCP connection. By default, half-closed client connections are kept open until a read(2) or write(2) on the socket returns an error. Change this option to 'off' and Squid will immediately close client connections when read (2) returns "no more data to read

Example
half_closed_clients off

Description
Persistent timeout is the timeout value for persistent connections. Squid closes persistent connections if they are idle for this amount of time. Persistent connections are disabled entirely if this option is set to a value less than 10 seconds. The default is 120 seconds and likely does not need to be changed.

Example
pconn_timeout 60 seconds

Description
Maximum time to wait for IDENT requests. If this is too high, and you enabled 'ident_lookup', then you might be susceptible to denial-of-service by having many ident requests going at once. Only src type ACL checks are fully supported. An src_domainACL might work at times, but it will not always provide the correct result. This option may be disabled by using --disable-ident with the configure script

Example
ident_timeout 5 seconds

Description
When SIGTERM or SIGHUP is received, the cache is put into "shutdown pending" mode until all active sockets are closed. This value is the lifetime to set for all open descriptors during shutdown mode. Any active clients after this many seconds will receive a 'timeout' message

Example
shutdown_lifetime 45 seconds

Caution
If this time is set to be too low then some file descriptors may remain open which will be a performance issue in memory usage.