89 lines
2.7 KiB
Markdown
89 lines
2.7 KiB
Markdown
# JVM Metrics
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The JMX Metric Gatherer provides built in JVM metric gathering capabilities.
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These metrics are sourced from Cassandra's exposed Dropwizard Metrics for each node: https://cassandra.apache.org/doc/latest/operating/metrics.html.
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## Metrics
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### Client Request Metrics
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* Name: `jvm.classes.loaded`
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* Description: The number of loaded classes
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* Unit: `1`
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* Instrument Type: LongValueObserver
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* Name: `jvm.gc.collections.count`
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* Description: The total number of garbage collections that have occurred
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* Unit: `1`
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* Instrument Type: LongSumObserver
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* Name: `jvm.gc.collections.elapsed`
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* Description: The approximate accumulated collection elapsed time
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* Unit: `ms`
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* Instrument Type: LongSumObserver
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* Name: `jvm.memory.heap.init`
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* Description: The initial amount of memory that the JVM requests from the operating system for the heap
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.heap.max`
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* Description: The maximum amount of memory can be used for the heap
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.heap.used`
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* Description: The current heap memory usage
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.heap.committed`
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* Description: The amount of memory that is guaranteed to be available for the heap
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.nonheap.init`
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* Description: The initial amount of memory that the JVM requests from the operating system for non-heap purposes
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.nonheap.max`
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* Description: The maximum amount of memory can be used for non-heap purposes
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.nonheap.used`
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* Description: The current non-heap memory usage
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.nonheap.committed`
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* Description: The amount of memory that is guaranteed to be available for non-heap purposes
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.pool.init`
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* Description: The initial amount of memory that the JVM requests from the operating system for the memory pool
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.pool.max`
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* Description: The maximum amount of memory can be used for the memory pool
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.pool.used`
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* Description: The current memory pool memory usage
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.memory.pool.committed`
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* Description: The amount of memory that is guaranteed to be available for the memory pool
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* Unit: `by`
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* Instrument Type: LongValueObserver
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* Name: `jvm.threads.count`
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* Description: The current number of threads
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* Unit: `1`
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* Instrument Type: LongValueObserver
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