List of Metrics

Cache Utilization Summary

Name	Type	Description
CacheState	GAUGE	Cache status for Coordinator and Workers (individually). 0: Not Available. 1: Read Only. 2. Fully Ready
CacheSpaceUsed	GAUGE	Used cache space
CacheSpaceAvailable	GAUGE	Total available cache space
CachePages	COUNTER	Number of cached pages
CachePagesEvicted	COUNTER	Number of pages evicted from cache
CacheBytesEvicted	COUNTER	Number of bytes evicted from cache
CachePutEvictionErrors	COUNTER	Errors count from cache eviction

Data Retrieval Statistics

The following metrics provide the statistics during data retrieval.

Name	Type	Description
CacheBytesReadCache	COUNTER	Data Read from Cache in bytes (Data Retrieval Cache Hits)
CacheBytesRequestedExternal	COUNTER	Data Read from UFS in bytes (Data Retrieval Cache Misses)

Storage Request Statistics

Cloud vendors charges for requests made against your cloud storage and objects. Usually request costs are based on the request type, and are charged on the quantity of requests. Here we provide a count of such relevant requests.

Name	Type	Description
CacheHitRequests	COUNTER	Data request served by Cache (Storage Request Cache Hits)
CacheExternalRequests	COUNTER	Data request to UFS (Storage Request Cache Miss).
GetFileInfoHitRequests	COUNTER	'GET' request served by Cache (Storage Request Cache Hits).
GetFileInfoExternalRequests	COUNTER	'GET' request to UFS (Storage Request Cache Miss).
ListStatusHitRequests	COUNTER	'LIST' request served by Cache (Storage Request Cache Hits).
ListStatusExternalRequests	COUNTER	'LIST' request to UFS (Storage Request Cache Miss).

Error Messages

PUT Errors (Writing Into Cache)

Name	Type	Description
CachePutErrors	COUNTER	Total error count when data write into cache. Summation of following detailed put errors.
CachePutNotReadyErrors	COUNTER	Count of the occurrences of failing to write because cache is still recovering, not in READ_WRITE mode.
CachePutStoreWriteErrors	COUNTER	Count of the occurrences of failing to write new pages to local disk.
CachePutStoreDeleteErrors	COUNTER	Count of the occurrences of failing to delete evicted pages from local disk
CachePutBenignRacingErrors	COUNTER	Count of the occurrences of certain race condition but doesn't affect the system. i.e. 2 threads trying to delete the same page.
CachePutEvictionErrors	COUNTER	Count of the occurrences of cache eviction failures
CachePutAsyncRejectionErrors	COUNTER	Count of the occurrences of thread pool limit reached when async write is enabled.

GET Errors (Reading From Cache)

Name	Type	Description
CacheGetErrors	COUNTER	Error count when data read from cache. Summation of following detailed GET errors.
CacheGetNotReadyErrors	COUNTER	Count of occurrences of read failure due to cache is in NOT_IN_USE mode.
CacheGetStoreReadErrors	COUNTER	Count of occurrences of failing to read pages from local disk.

Machine Resources

NOTE: The name is a reference, it may vary slightly based on your environment.

Name	Type	Description
CpuLoad	GAUGE	CPU Load
maxFileCount	GAUGE	OS Max File Count
openFileCount	GAUGE	OS Open File Count