HBase - RegionServers
The HBase - RegionServers dashboards display metrics for RegionServers in the monitored HBase cluster, including some performance-related data. These dashboards help you view basic I/O data and compare load among RegionServers.
| Row | Metrics |
Description |
|---|---|---|
|
NUM REGIONS |
Num Regions | Number of regions in the RegionServer. |
|
STORE FILES |
Store File Size | Total size of the store files (data files) in the RegionServer. |
|
Store File Count | Total number of store files in the RegionServer. | |
|
NUM REQUESTS |
Num Total Requests /s |
Total number of requests (both read and write) per second in the RegionServer. |
|
Num Write Requests /s | Total number of write requests per second in the RegionServer. | |
|
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 | Total number of Scan requests per second in the RegionServer. | |
|
NUM REQUESTS - MUTATE / DELETE |
Num Mutate Requests - /s | Total number of Mutate requests per second in the RegionServer. |
|
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 | Offheap Memory used by the RegionServer. | |
|
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 | Number of BlockCache hits per second in the RegionServer. |
|
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 | Percentage of BlockCache hits per second in the RegionServer. | |
|
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 | Median latency for RPC calls to stay in the RPC queue in the RegionServer. | |
|
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 | 75th percentile latency for RPC calls to be processed in the RegionServer. | |
|
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 | Total files sized of Write-Ahead-Logs in the RegionServer. | |
| WAL - THROUGHPUT | 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. | |
| SLOW OPERATIONS | 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 | Total time spend in Java ParNew(YoungGen) Garbage Collections per second. | |
|
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. |