https://bugs.exim.org/show_bug.cgi?id=3084
--- Comment #3 from Jeremy Harris <[email protected]> --- Macros are evaluated at config load time, which means at every process exec: every command-line-source message, the daemon, every delivery-routing action and every nonlocal transport. The config is loaded in full every time. Exim runs a pool of DB connections, though because it also traverses several processes during the handling of a message, and in large part any given process only handles one message, the benefit of the pool is limited. Many DB accesses during the input ACL processing for a connection will benefit most. Additionally, character-identical lookups will hit in a local cache. New DB connections are made lazily, not associated with use of the main-config option (mysql_zervers or similar) versus a spec local to the lookup in question. The connection is then held open in the pool (until overflow or a full tidyup is needed). -- You are receiving this mail because: You are on the CC list for the bug. -- ## subscription configuration (requires account): ## https://lists.exim.org/mailman3/postorius/lists/exim-dev.lists.exim.org/ ## unsubscribe (doesn't require an account): ## [email protected] ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
