Active Handlers | Number of active RPC handlers. |
Active Read Handlers | Number of active read RPC handlers. |
Active Scan Handlers | Number of active scan RPC handlers. |
Active Write Handlers | Number of active write RPC handlers. |
Average Read Latency (Milliseconds) | Average latency of HFile reads on the server. |
Average Region Size (Bytes) | Average size of regions on the Region Server, including MemStore and store files sizes. |
Average Store File Age (Milliseconds) | Average age of store files on the Region Server. |
Average Write Latency (Milliseconds) | Average latency of HFile writes on the server. |
Block Cache Blocks (Blocks) | Number of blocks in the block cache. |
Block Cache Bloom Chunk Hits | Count of block cache hits for bloom filter blocks. |
Block Cache Bloom Chunk Misses | Count of block cache misses for bloom filter blocks. |
Block Cache Data Hits | Count of block cache hits for data blocks. |
Block Cache Data Misses | Count of block cache misses for data blocks. |
Block Cache Delete Family Bloom Metadata Hits | Count of block cache hits for Delete Family Bloom filter metadata blocks. |
Block Cache Delete Family Bloom Metadata Misses | Count of block cache misses for Delete Family Bloom filter metadata blocks. |
Block Cache Evictions (Blocks) | Count of blocks evicted from the block cache. |
Block Cache Express Hit Rate (%) | Ratio of requests with caching turned on that hit the cache. |
Block Cache Failed Insertions | Count of failed block cache insertions. |
Block Cache File Info Hits | Count of block cache hits for File Info blocks. |
Block Cache File Info Misses | Count of block cache misses for File Info blocks. |
Block Cache Free Space (Bytes) | Amount of data free in the block cache. |
Block Cache General Bloom Metadata Hits | Count of block cache hits for General Bloom Metadata blocks. |
Block Cache General Bloom Metadata Misses | Count of block cache misses for General Bloom Metadata blocks. |
Block Cache Hit Rate (%) | Ratio of block cache requests which are hits. |
Block Cache Hits | Count of block cache hits. |
Block Cache Intermediate Index Hits | Count of block cache hits for Intermediate Index blocks. |
Block Cache Intermediate Index Misses | Count of block cache hits for Intermediate Index blocks. |
Block Cache Leaf Index Hits | Count of block cache hits for Leaf Index blocks. |
Block Cache Leaf Index Misses | Count of block cache misses for Leaf Index blocks. |
Block Cache Meta Hits | Count of block cache hits for Meta blocks. |
Block Cache Meta Misses | Count of block cache misses for Meta blocks. |
Block Cache Misses | Count of block cache misses. |
Block Cache Primary Misses | Count of misses on the primary replica in the block cache. |
Block Cache Primary Replica Evictions (Blocks) | Count of blocks evicted from the primary replica of the block cache. |
Block Cache Primary Replica Hits | Count of hits on the primary replica in the block cache. |
Block Cache Root Index Hits | Count of block cache hits for Root Index blocks. |
Block Cache Root Index Misses | Count of block cache misses for Root Index blocks. |
Block Cache Size (Bytes) | Memory in use by the block cache. |
Block Cache Trailer Hits | Count of block cache hits for Trailer blocks. |
Block Cache Trailer Misses | Count of block cache misses for Trailer blocks. |
Blocked Requests (Requests) | Count of requests blocked due to MemStore size being larger than 'blockingMemStoreSize'. |
CallQueueTooBig Exceptions (Errors) | Count of 'CallQueueTooBig' exceptions caused by requests. This exception is thrown when too many items are queued. |
Calls in Read Queue (Calls) | Number of calls in the read queue which are waiting to be executed. |
Calls in Scan Queue (Calls) | Number of calls in the scan queue which are waiting to be executed. |
Calls in Write Queue (Calls) | Number of calls in the write queue which are waiting to be executed. |
Checksum Failures | Count of checksum failures for HFile checksums. These checksums are separate from HDFS checksums. |
Cluster ID | Identifier for the cluster. |
Compaction Queue Length | Depth of the compaction queue. |
Compilation Time (Milliseconds) | The approximate accumulated elapsed time spent in compilation. |
CPU Time (Nanoseconds) | The CPU time used by the process on which the Java virtual machine is running. |
Daemon Threads (Threads) | The current number of live daemon threads. |
Enqueued User Requests (Calls) | Number of calls in the general call queue. |
Exceptions (Errors) | Count of exceptions caused by requests. |
Failed Check and Mutate Calls (Calls) | Count of failed Check and Mutate calls. |
FailedSanityCheck Exceptions (Errors) | Count of 'FailedSanityCheck' exceptions caused by requests. This exception is thrown when a mutation fails sanity checks. |
Flush Queue Length | Depth of the MemStore flush queue. |
Garbage Collector Collection Count | The total number of collections that have occurred. |
Garbage Collector Collection Time (Milliseconds) | The accumulated collection elapsed time. |
General Calls Dropped (Calls) | Count of calls from the general queue which were dropped by the Controlled Delay RPC executor. |
Heap Memory Committed (Bytes) | The amount of heap memory that is committed for the Java virtual machine to use. |
Heap Memory Initialized (Bytes) | The amount of heap memory that the Java virtual machine initially requests from the operating system for memory management. |
Heap Memory Used (Bytes) | The amount of used heap memory. |
Hostname | Hostname of the region server. |
L1 Cache Hit Ratio | Ratio of L1 cache hits to L1 cache misses. |
L1 Cache Hits | Count of L1 cache hits. |
L1 Cache Miss Ratio | Ratio of L1 cache misses to L1 cache hits. |
L1 Cache Misses | Count of L1 cache misses. |
L2 Cache Hit Ratio | Ratio of L2 cache hits to L2 cache misses. |
L2 Cache Hits | Count of L2 cache hits. |
L2 Cache Miss Ratio | Ratio of L2 cache misses to L2 cache hits. |
L2 Cache Misses | Count of L2 cache misses. |
LIFO Mode Switches (Calls) | Count of calls from the general queue which were served from the tail of the queue. |
Live Threads (Threads) | The current number of live threads including both daemon and non-daemon threads. |
Loaded Classes Count | The number of classes that are currently loaded in the Java virtual machine. |
Local Files (%) | Ratio of store file data stored on the local DataNode. |
Maximum Heap Memory (Bytes) | The maximum amount of heap memory that can be used for memory management. |
Maximum Non-heap Memory (Bytes) | The maximum amount of non-heap memory that can be used for memory management. |
Maximum Read Latency (Milliseconds) | Maximum latency of HFile reads on the server. |
Maximum Store File Age (Milliseconds) | Age of the oldest store file on the Region Server. |
Maximum Write Latency (Milliseconds) | Maximum latency of HFile writes on the server. |
Median Read Latency (Milliseconds) | Median latency of HFile reads on the server. |
Median Write Latency (Milliseconds) | Median latency of HFile writes on the server. |
MemStore Size (Bytes) | Size of the Region Server's MemStore. |
Minimum Read Latency (Milliseconds) | Minimum latency of HFile reads on the server. |
Minimum Store File Age (Milliseconds) | Age of the newest store file on the Region Server. |
Minimum Write Latency (Milliseconds) | Minimum latency of HFile writes on the server. |
MultiResponseTooLarge Exceptions (Errors) | Count of responses to multi requests that were too large. As a result, the remaining requests will need to be retried. |
Mutations Without WAL | Number of mutations received from clients with WAL disabled. |
Non-heap Memory Committed (Bytes) | The amount of non-heap memory that is committed for the Java virtual machine to use. |
Non-heap Memory Initialized (Bytes) | The amount of non-heap memory that the Java virtual machine initially requests from the operating system for memory management. |
Non-heap Memory Used (Bytes) | The amount of used non-heap memory. |
NotServingRegion Exceptions (Errors) | Count of 'NotServingRegion' exceptions caused by requests. This exception is thrown when a mutation fails sanity checks. |
Open Connections (Connections) | Number of open connections. |
Open Files | The number of open file descriptors. |
OutOfOrderScannerNext Exceptions (Errors) | Count of 'OutOfOrderScannerNext' exceptions caused by requests. This exception is thrown when the 'nextCallSeq' calculated by both the client and server don't match. |
Passed Check and Mutate Calls (Calls) | Count Check and Mutate calls which passed the checks. |
Peak Threads (Threads) | The peak live thread count since the Java virtual machine started or peak was reset. |
Queue Size (Bytes) | Sum of size of calls currently queued. |
Read Operations (Operations) | Count of HFile write operations. |
Read Requests (Requests) | Count of read requests handled by the Region Server. |
Received Traffic (Bytes) | Amount of data received. |
Reference Files | Number of reference files on the Region Server. |
RegionMoved Exceptions (Errors) | Count of 'RegionMoved' exceptions caused by requests. This exception is thrown when the the server knows that the region has moved to a different server. |
RegionTooBusy Exceptions (Errors) | Count of 'RegionTooBusy' exceptions caused by requests. This exception is thrown when a region server would have blocked and waited to serve a request. |
Regions | Number of regions hosted by the Region Server. |
Requests (Requests) | Count of requests handled by the Region Server. |
Row Action Requests | Count of row actions across requests handled by the Region Server. |
RPC Get Requests (Requests) | Count of RPC get requests handled by the Region Server. |
RPC Multi Requests (Requests) | Count of RPC multi requests handled by the Region Server. |
RPC Mutate Requests (Requests) | Count of RPC mutation requests handled by the Region Server. |
RPC Scan Requests (Requests) | Count of RPC scan requests handled by the Region Server. |
ScannerReset Exceptions (Errors) | Count of 'ScannerReset' exceptions caused by requests. This exception is thrown when the server receives an exception and asks the client to reset the scanner state. |
Sent Traffic (Bytes) | Amount of data sent. |
Server Name | Identifier for the Region Server within the context of its cluster, created from its hostname, port, and startcode. |
Size of Mutations Without WAL (Bytes) | Aggregate size of mutations received from clients with WAL disabled. |
Slow Appends | Count of Appends that took over 1000ms to complete. |
Slow Deletes | Count of Deletes that took over 1000ms to complete. |
Slow Gets | Count of Gets that took over 1000ms to complete. |
Slow Increments | Count of Increments that took over 1000ms to complete. |
Slow Puts | Count of Puts that took over 1000ms to complete. |
Specification Version | The Java virtual machine specification version. |
Started Threads (Threads) | The total number of threads created and also started since the Java virtual machine started. |
Store File Size (Bytes) | Size of all store files on the Region Server's disk. |
Store Files | Number of store files managed by the Region Server. |
Stores | Number of stores hosted by the Region Server. |
UnknownScanner Exceptions (Errors) | Count of 'OutOfOrderScannerNext' exceptions caused by requests. This exception is thrown when the server receives an unknown scanner ID. |
Update Blocking Duration (Milliseconds) | Count of how long updates have been blocked so that the MemStore can be flushed. |
Uptime (Milliseconds) | The uptime of the Java virtual machine. |
Vendor | The Java virtual machine specification vendor. |
WAL File Size (Bytes) | Size of all WAL files on the Region Server. |
WAL Files | Number of WAL files. |
Write Operations (Operations) | Count of HFile write operations. |
Write Requests (Requests) | Count of write requests handled by the Region Server. |