Squid configuration directive happy_eyeballs_connect_limit
This directive is not available in the v4 version of Squid.
For older versions than v4 see the linked pages above
Configuration Details:
Option Name: | happy_eyeballs_connect_limit |
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Replaces: | |
Requires: | |
Default Value: | no artificial limit on the number of concurrent spare attempts |
Suggested Config: |
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This Happy Eyeballs (RFC 8305) tuning directive specifies the maximum number of spare to-server connections (to any server; i.e. across all concurrent master transactions in a Squid instance). Each SMP worker gets an equal share of the total limit. However, the workers do not share the actual connection counts yet, so one (busier) worker cannot "borrow" spare connection slots from another (less loaded) worker. Setting this limit to zero disables concurrent use of primary and spare TCP connections: Spare connection attempts are made only after all primary attempts fail. However, Squid would still use the DNS-related optimizations of the Happy Eyeballs approach. This directive has similar trade-offs as happy_eyeballs_connect_gap, but its focus is on limiting Squid overheads, while happy_eyeballs_connect_gap focuses on the origin server and peer overheads. The following Happy Eyeballs directives place additional connection opening restrictions: happy_eyeballs_connect_timeout and happy_eyeballs_connect_gap. See the former for related terminology. |
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