Cache Volume
Each configured cache volume receives a complete set of statistics from
Traffic Server. They are differentiated from each other by the incrementing number that is
part of the statistic name. The volume number begins at 0 and
increments by 1 for each additional volume.
The statistics are documented in this section using the default volume number in
a configuration with only one cache volume: 0.
- proxy.process.cache.volume_0.bytes_total
- Collection:
- global
- Type:
- gauge
- Units:
- bytes
- Datatype:
- integer
Represents the total number of bytes allocated for the cache volume.
- proxy.process.cache.volume_0.bytes_used
- Collection:
- global
- Type:
- gauge
- Units:
- bytes
- Datatype:
- integer
Represents the number of bytes in this cache volume which are occupied by cache objects.
- proxy.process.cache.volume_0.directory_collision
- Collection:
- global
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.direntries.total
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
Represents the total number of directory entries which have been allocated in this cache volume.
- proxy.process.cache.volume_0.direntries.used
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
Represents the number of allocated directory entries in this cache volume which are in use.
- proxy.process.cache.volume_0.evacuate.active
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.evacuate.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.evacuate.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.frags_per_doc.1
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.frags_per_doc.2
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.frags_per_doc.3+
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.gc_bytes_evacuated
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.gc_frags_evacuated
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.hdr_marshal_bytes
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.hdr_marshals
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.lookup.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.lookup.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.lookup.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.percent_full
- Collection:
- global
- Type:
- gauge
- Units:
- percent
- Datatype:
- integer
- proxy.process.cache.volume_0.pread_count
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.ram_cache.bytes_used
- Collection:
- global
- Type:
- gauge
- Units:
- bytes
- Datatype:
- integer
- proxy.process.cache.volume_0.ram_cache.hits
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
Accumulates the number of hits to the LRU RAM cache for this volume.
- proxy.process.cache.volume_0.ram_cache.misses
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
Accumulates the number of misses to the LRU RAM cache for this volume. Note that this count includes hits to the other memory caches, including the last open read and aggregation buffer caches, so it may not represent the total number of cache accesses that go to disk.
- proxy.process.cache.volume_0.last_open_read.hits
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
Accumulates the number of hits to the last open read cache for this volume. This cache stores the most recent read operation for each open cache volume.
- proxy.process.cache.volume_0.aggregation_buffer.hits
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
Accumulates the number of hits to the aggregation buffer for this volume. This buffer stores data fragments that are on their way to be written to disk for write aggregation.
- proxy.process.cache.volume_0.all_memory_caches.misses
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
Accumulates the number of misses to all memory caches (LRU RAM cache, last open read cache, and aggregation buffer) for this volume. This represents the total number of cache accesses that go to disk for this volume.
- proxy.process.cache.volume_0.ram_cache.total_bytes
- Collection:
- global
- Type:
- gauge
- Units:
- bytes
- Datatype:
- integer
- proxy.process.cache.volume_0.read.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- proxy.process.cache.volume_0.read_busy.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.read_busy.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.read.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.read.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.remove.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.remove.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.remove.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.scan.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.scan.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.scan.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.update.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.update.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.update.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.vector_marshals
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.write.active
- Collection:
- global
- Type:
- gauge
- Datatype:
- integer
- proxy.process.cache.volume_0.write.backlog.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.write_bytes
- Collection:
- global
- Type:
- counter
- Units:
- bytes
- Datatype:
- integer
- Gathered:
- No
- proxy.process.cache.volume_0.write.failure
- Collection:
- global
- Type:
- counter
- Datatype:
- integer
- proxy.process.cache.volume_0.write.success
- Collection:
- global
- Type:
- counter
- Datatype:
- integer