I am reviewing the ColdFusion Web Connector settings in workers.properties to hopefully address a sporadic response time issue.
I've been advised to inspect the output from the metrics.log file (CF Admin > Debugging & Logging > Debug Output Settings > Enable Metric Logging) and use this to inform the adjustments to the settings max_reuse_connections, connection_pool_size and connection_pool_timeout.
My question is: How do I interpret the metrics.log output to help with the choice of setting values? Is there any documentation that can guide me?
Examples from over a 120 hour period:
95% of entries -
"Information","scheduler-2","06/16/14","08:09:04",,"Max threads: 150 Current thread count: 4 Current thread busy: 0 Max processing time: 83425 Request count: 9072 Error count: 72 Bytes received: 1649 Bytes sent: 22768583 Free memory: 124252584 Total memory: 1055326208 Active Sessions: 1396"
Occurred once -
"Information","scheduler-2","06/13/14","14:20:22",,"Max threads: 150 Current thread count: 10 Current thread busy: 5 Max processing time: 2338 Request count: 21 Error count: 4 Bytes received: 155 Bytes sent: 139798 Free memory: 114920208 Total memory: 1053097984 Active Sessions: 6899"
Environment:
- 3 x Windows 2008 R2 (hardware load balanced)
- ColdFusion 10 (update 12)
- Apache 2.2.21