Cache Metrics
Every 10 seconds, the collectd service uses a plugin to gather the following Data Fabric file system cache metrics on each node in the cluster.
Name | Description |
---|---|
mapr.cache.lookups_data | The number of cache lookups in the block cache. |
mapr.cache.lookups_dir | The number of cache lookups in the table LRU cache. The table LRU is used for storing internal B-Tree leaf pages. |
mapr.cache.lookups_inode | The number of cache lookups in the inode cache. |
mapr.cache.lookups_largefile | The number of cache lookups in the large file LRU cache. The large file LRU is used for storing files with size greater than 64K and also HPE Ezmeral Data Fabric Database data pages. |
mapr.cache.lookups_meta | The number of cache lookups on the meta LRU cache. The meta LRU is used for storing internal B-Tree pages. |
mapr.cache.lookups_smallfile | The number of cache lookups on the small file LRU cache. This LRU is used for storing files with size less than 64K and also HPE Ezmeral Data Fabric Database index pages. |
mapr.cache.lookups_table | The number of cache lookups in the table LRU cache. The table LRU is used for storing internal B-Tree leaf pages. |
mapr.cache.misses_data | The number of cache misses in the block cache. |
mapr.cache.misses_dir | The number of cache misses on the table LRU cache. |
mapr.cache.misses_inode | The number of cache misses in the inode cache. |
mapr.cache.misses_largefile | The number of cache misses on the large file LRU cache. |
mapr.cache.misses_meta | The number of cache misses on the meta LRU cache. |
mapr.cache.misses_smallfile | The number of cache misses on the small file LRU cache. |
mapr.cache.misses_table | The number of cache misses on the table LRU cache. |