NUM REGIONS

Num Regions

STORE FILES

Store File Size

Store File Count

NUM REQUESTS

Num Total Requests /s

Total number of requests (both read and write) per second in the RegionServer.

Num Write Requests /s

Num Read Requests /s

Total number of read requests per second in the RegionServer.

NUM REQUESTS - GET / SCAN

Num Get Requests /s

Total number of Get requests per second in the RegionServer.

Num Scan Next Requests /s

NUM REQUESTS - MUTATE / DELETE

Num Mutate Requests - /s

Num Delete Requests /s

Total number of Delete requests per second in the RegionServer.

NUM REQUESTS - APPEND / INCREMENT

Num Append Requests /s

Total number of Append requests per second in the RegionServer.

Num Increment Requests /s

Total number of Increment requests per second in the RegionServer.

Num Replay Requests /s

Total number of Replay requests per second in the RegionServer.

MEMORY

RegionServer Memory Used

Heap Memory used by the RegionServer.

RegionServer Offheap Memory Used

MEMSTORE

Memstore Size

Total Memstore memory size of the RegionServer.

BLOCKCACHE - OVERVIEW

BlockCache - Size

Total BlockCache size of the RegionServer.

BlockCache - Free Size

Total free space in the BlockCache of the RegionServer.

Num Blocks in Cache

Total number of hfile blocks in the BlockCache of the RegionServer.

BLOCKCACHE - HITS/MISSES

Num BlockCache Hits /s

Num BlockCache Misses /s

Number of BlockCache misses per second in the RegionServer.

Num BlockCache Evictions /s

Number of BlockCache evictions per second in the RegionServer.

BlockCache Caching Hit Percent

Percentage of BlockCache hits per second for requests that requested cache blocks in the RegionServer.

BlockCache Hit Percent

OPERATION LATENCIES - GET

Get Latencies - Mean

Mean latency for Get operation in the RegionServer.

Get Latencies - Median

Median latency for Get operation in the RegionServer.

Get Latencies - 75th Percentile

75th percentile latency for Get operation in the RegionServer

Get Latencies - 95th Percentile

95th percentile latency for Get operation in the RegionServer.

Get Latencies - 99th Percentile

99th percentile latency for Get operation in the RegionServer.

Get Latencies - Max

Max latency for Get operation in the RegionServer.

OPERATION LATENCIES - SCAN NEXT

Scan Next Latencies - Mean

Mean latency for Scan operation in the RegionServer.

Scan Next Latencies - Median

Median latency for Scan operation in the RegionServer.

Scan Next Latencies - 75th Percentile

75th percentile latency for Scan operation in the RegionServer.

Scan Next Latencies - 95th Percentile

95th percentile latency for Scan operation in the RegionServer.

Scan Next Latencies - 99th Percentile

99th percentile latency for Scan operation in the RegionServer.

Scan Next Latencies - Max

Max latency for Scan operation in the RegionServer.

OPERATION LATENCIES - MUTATE

Mutate Latencies - Mean

Mean latency for Mutate operation in the RegionServer.

Mutate Latencies - Median

Median latency for Mutate operation in the RegionServer.

Mutate Latencies - 75th Percentile

75th percentile latency for Mutate operation in the RegionServer.

Mutate Latencies - 95th Percentile

95th percentile latency for Mutate operation in the RegionServer.

Mutate Latencies - 99th Percentile

99th percentile latency for Mutate operation in the RegionServer.

Mutate Latencies - Max

Max latency for Mutate operation in the RegionServer.

OPERATION LATENCIES - DELETE

Delete Latencies - Mean

Mean latency for Delete operation in the RegionServer.

Delete Latencies - Median

Median latency for Delete operation in the RegionServer.

Delete Latencies - 75th Percentile

75th percentile latency for Delete operation in the RegionServer.

Delete Latencies - 95th Percentile

95th percentile latency for Delete operation in the RegionServer.

Delete Latencies - 99th Percentile

99th percentile latency for Delete operation in the RegionServer.

Delete Latencies - Max

Max latency for Delete operation in the RegionServer.

OPERATION LATENCIES - INCREMENT

Increment Latencies - Mean

Mean latency for Increment operation in the RegionServer.

Increment Latencies - Median

Median latency for Increment operation in the RegionServer.

Increment Latencies - 75th Percentile

75th percentile latency for Increment operation in the RegionServer.

Increment Latencies - 95th Percentile

95th percentile latency for Increment operation in the RegionServer.

Increment Latencies - 99th Percentile

99th percentile latency for Increment operation in the RegionServer.

Increment Latencies - Max

Max latency for Increment operation in the RegionServer.

OPERATION LATENCIES - APPEND

Append Latencies - Mean

Mean latency for Append operation in the RegionServer.

Append Latencies - Median

Median latency for Append operation in the RegionServer.

Append Latencies - 75th Percentile

75th percentile latency for Append operation in the RegionServer.

Append Latencies - 95th Percentile

95th percentile latency for Append operation in the RegionServer.

Append Latencies - 99th Percentile

99th percentile latency for Append operation in the RegionServer.

Append Latencies - Max

Max latency for Append operation in the RegionServer.

OPERATION LATENCIES - REPLAY

Replay Latencies - Mean

Mean latency for Replay operation in the RegionServer.

Replay Latencies - Median

Median latency for Replay operation in the RegionServer.

Replay Latencies - 75th Percentile

75th percentile latency for Replay operation in the RegionServer.

Replay Latencies - 95th Percentile

95th percentile latency for Replay operation in the RegionServer.

Replay Latencies - 99th Percentile

99th percentile latency for Replay operation in the RegionServer.

Replay Latencies - Max

Max latency for Replay operation in the RegionServer.

RPC - OVERVIEW

Num RPC /s

Number of RPCs per second in the RegionServer.

Num Active Handler Threads

Number of active RPC handler threads (to process requests) in the RegionServer.

Num Connections

Number of connections to the RegionServer.

RPC - QUEUES

Num RPC Calls in General Queue

Number of RPC calls in the general processing queue in the RegionServer.

Num RPC Calls in Priority Queue

Number of RPC calls in the high priority (for system tables) processing queue in the RegionServer.

Num RPC Calls in Replication Queue

Number of RPC calls in the replication processing queue in the RegionServer.

RPC - Total Call Queue Size

Total data size of all RPC calls in the RPC queues in the RegionServer.

RPC - CALL QUEUED TIMES

RPC - Call Queued Time - Mean

Mean latency for RPC calls to stay in the RPC queue in the RegionServer.

RPC - Call Queued Time - Median

RPC - Call Queued Time - 75th Percentile

75th percentile latency for RPC calls to stay in the RPC queue in the RegionServer.

RPC - Call Queued Time - 95th Percentile

95th percentile latency for RPC calls to stay in the RPC queue in the RegionServer.

RPC - Call Queued Time - 99th Percentile

99th percentile latency for RPC calls to stay in the RPC queue in the RegionServer.

RPC - Call Queued Time - Max

Max latency for RPC calls to stay in the RPC queue in the RegionServer.

RPC - CALL PROCESS TIMES

RPC - Call Process Time - Mean

Mean latency for RPC calls to be processed in the RegionServer.

RPC - Call Process Time - Median

Median latency for RPC calls to be processed in the RegionServer.

RPC - Call Process Time - 75th Percentile

RPC - Call Process Time - 95th Percentile

95th percentile latency for RPC calls to be processed in the RegionServer.

RPC - Call Process Time - 99th Percentile

99th percentile latency for RPC calls to be processed in the RegionServer.

RPC - Call Process Time - Max

Max latency for RPC calls to be processed in the RegionServer.

RPC - THROUGHPUT

RPC - Received bytes /s

Received bytes from the RPC in the RegionServer.

RPC - Sent bytes /s

Sent bytes from the RPC in the RegionServer.

WAL - FILES

Num WAL - Files

Number of Write-Ahead-Log files in the RegionServer.

Total WAL File Size

WAL - Num Appends /s

Number of append operations per second to the filesystem in the RegionServer.

WAL - Num Sync /s

Number of sync operations per second to the filesystem in the RegionServer.

WAL - SYNC LATENCIES

WAL - Sync Latencies - Mean

Mean latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - Sync Latencies - Median

Median latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - Sync Latencies - 75th Percentile

75th percentile latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - Sync Latencies - 95th Percentile

95th percentile latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - Sync Latencies - 99th Percentile

99th percentile latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - Sync Latencies - Max

Max latency for Write-Ahead-Log sync operation to the filesystem in the RegionServer.

WAL - APPEND LATENCIES

WAL - Append Latencies - Mean

Mean latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Latencies - Median

Median latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Latencies - 75th Percentile

95th percentile latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Latencies - 95th Percentile

95th percentile latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Latencies - 99th Percentile

99th percentile latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Latencies - Max

Max latency for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - APPEND SIZES

WAL - Append Sizes - Mean

Mean data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Sizes - Median

Median data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Sizes - 75th Percentile

75th percentile data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Sizes - 95th Percentile

95th percentile data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Sizes - 99th Percentile

99th percentile data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL - Append Sizes - Max

Max data size for Write-Ahead-Log append operation to the filesystem in the RegionServer.

WAL Num Slow Append /s

Number of append operations per second to the filesystem that took more than 1 second in the RegionServer.

Num Slow Gets /s

Number of Get requests per second that took more than 1 second in the RegionServer.

Num Slow Puts /s

Number of Put requests per second that took more than 1 second in the RegionServer.

Num Slow Deletes /s

Number of Delete requests per second that took more than 1 second in the RegionServer.

FLUSH/COMPACTION QUEUES

Flush Queue Length

Number of Flush operations waiting to be processed in the RegionServer. A higher number indicates flush operations being slow.

Compaction Queue Length

Number of Compaction operations waiting to be processed in the RegionServer. A higher number indicates compaction operations being slow.

Split Queue Length

Number of Region Split operations waiting to be processed in the RegionServer. A higher number indicates split operations being slow.

JVM - GC COUNTS

GC Count /s

Number of Java Garbage Collections per second.

GC Count ParNew /s

Number of Java ParNew (YoungGen) Garbage Collections per second.

GC Count CMS /s

Number of Java CMS Garbage Collections per second.

JVM - GC TIMES

GC Times /s

Total time spend in Java Garbage Collections per second.

GC Times ParNew /s

GC Times CMS /s

Total time spend in Java CMS Garbage Collections per second.

LOCALITY

Percent Files Local

Percentage of files served from the local DataNode for the RegionServer.