ACD Router is a single threaded PHP daemon that heavily relies on PosgreSQL database.
Profiling revealed that SQL backend tuning is critical otherwise update queries can take 100ms and performance can drop to as low as 10 calls a second.
postgreSQL tuning
/var/lib/pgsql/data/postgresql.conf
Changing these options requires
 | This "little" change gives 10 fold performance boost!  |
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