Clients can cache result sets with a time-to-live on them. The cache
manager goes through the cached result sets periodically and removes
the ones that have expired.
sqlr-cachemanager daemon to establish the cache manager.
Only one cache manager needs to be started per machine.
Important Note: Since cache managers clean up after SQL Relay clients, not servers,
they need to be run on machines which run clients that could cache
result sets. These may not be the same machines that run the
sqlr-listener and sqlr-connection daemons. If there is no SQL Relay
installation on those machines, you should create the cache directory
(/var/cache/sqlrelay), install the sqlr-cachemanager program by itself
and set it up to run at boot time.