Admin: Health
From Resin 3.0
You can use the Health section of /resin-admin to check on the health status of Resin and its clusters. Resin's health capability is a set of HealthChecks that Resin runs every few minutes to verify that everything is working properly. Health requires Resin Professional.
If a health check fails, Resin will retry several times (default 3) within a short period of time (1 min). If the server continues to fail, Resin will force a restart and log the status.
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Health Checks
Resin has a number of predefined health checks, checking memory, basic threading and pinging HTTP urls of the server to ensure everything is working properly.
Resin
The Resin health check is a summary for all the children health checks. Its health is the highest warning level of all the children.
Resin|JvmDeadlock
The JvmDeadlock health check queries the JVM to see if the JVM has detected any thread locks.
Resin|MemoryTenured
MemoryTenured checks the free heap memory available. If the memory is too low, it will force a garbage collection. If the memory continues to be low, it will fail, forcing a restart.
Resin|MemoryPermGen
MemoryPermGen checks the PermGen heap available, where the PermGen is the JVM's memory dedicated to .class files. If the memory is too low, it will force a GC. A continued failure will force a restart.
