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Postfix Documentation
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Connection cache statistics

The scache(8) connection cache server logs statistics about the peak cache size and the cache hit rates. This information is logged every connection_cache_status_update_time seconds, when the process terminates after the maximal idle time is exceeded, or when Postfix is reloaded.

  • Hit rates for connection cache lookups by domain will tell you how useful connection caching is.

  • Connection cache lookups by network address will always fail, unless you're sending mail to different domains that share the same MX hosts.

  • No statistics are logged when no attempts are made to access the connection cache.

Postfix Documentation
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