Package org.apache.hadoop.hbase.regionserver

Interface MetricsRegionWrapper

All Known Implementing Classes:
MetricsRegionWrapperImpl
@Private public interface MetricsRegionWrapper
Interface of class that will wrap an HRegion and export numbers so they can be used in MetricsRegionSource

  • Method Details

    • getTableName

      String getTableName()
      Get the name of the table the region belongs to.
      Returns:
      The string version of the table name.

    • getNamespace

      String getNamespace()
      Get the name of the namespace this table is in.
      Returns:
      String version of the namespace. Can't be empty.

    • getRegionName

      String getRegionName()
      Get the name of the region.
      Returns:
      The encoded name of the region.

    • getNumStores

      long getNumStores()
      Get the number of stores hosted on this region server.

    • getNumStoreFiles

      long getNumStoreFiles()
      Get the number of store files hosted on this region server.

    • getMemStoreSize

      long getMemStoreSize()
      Get the size of the memstore on this region server.

    • getStoreFileSize

      long getStoreFileSize()
      Get the total size of the store files this region server is serving from.

    • getCurrentRegionCacheRatio

      float getCurrentRegionCacheRatio()
      Gets the current cache % ratio for this region.

    • getReadRequestCount

      long getReadRequestCount()
      Get the total number of read requests that have been issued against this region

    • getCpRequestCount

      long getCpRequestCount()
      Get the total number of CoprocessorService requests that have been issued against this region

    • getFilteredReadRequestCount

      long getFilteredReadRequestCount()
      Get the total number of filtered read requests that have been issued against this region

    • getMaxStoreFileAge

      long getMaxStoreFileAge()
      Returns Max age of store files under this region

    • getMinStoreFileAge

      long getMinStoreFileAge()
      Returns Min age of store files under this region

    • getAvgStoreFileAge

      long getAvgStoreFileAge()
      Returns Average age of store files under this region

    • getNumReferenceFiles

      long getNumReferenceFiles()
      Returns Number of reference files under this region

    • getWriteRequestCount

      long getWriteRequestCount()
      Get the total number of mutations that have been issued against this region.

    • getTotalRequestCount

      long getTotalRequestCount()

    • getNumFilesCompacted

      long getNumFilesCompacted()

    • getNumBytesCompacted

      long getNumBytesCompacted()

    • getNumCompactionsCompleted

      long getNumCompactionsCompleted()

    • getLastMajorCompactionAge

      long getLastMajorCompactionAge()
      Returns Age of the last major compaction

    • getNumCompactionsFailed

      long getNumCompactionsFailed()
      Returns the total number of compactions that have been reported as failed on this region. Note that a given compaction can be reported as both completed and failed if an exception is thrown in the processing after HRegion.compact().

    • getNumCompactionsQueued

      long getNumCompactionsQueued()
      Returns the total number of compactions that are currently queued(or being executed) at point in time

    • getNumFlushesQueued

      long getNumFlushesQueued()
      Returns the total number of flushes currently queued(being executed) for this region at point in time

    • getMaxCompactionQueueSize

      long getMaxCompactionQueueSize()
      Note that this metric is updated periodically and hence might miss some data points.
      Returns:
      the max number of compactions queued for this region

    • getMaxFlushQueueSize

      long getMaxFlushQueueSize()
      Note that this metric is updated periodically and hence might miss some data points.
      Returns:
      the max number of flushes queued for this region

    • getRegionHashCode

      int getRegionHashCode()

    • getReplicaId

      int getReplicaId()
      Get the replica id of this region.

    • getStoreRefCount

      long getStoreRefCount()
      Returns the number of references active on the store

    • getMaxCompactedStoreFileRefCount

      long getMaxCompactedStoreFileRefCount()
      Returns the max number of references active on any store file among all compacted store files that belong to this region

    • getMemstoreOnlyRowReadsCount

      Map<String,Long> getMemstoreOnlyRowReadsCount()
      Returns the number of row reads completely on memstore per store

    • getMixedRowReadsCount

      Map<String,Long> getMixedRowReadsCount()
      Returns the number of row reads on memstore and file per store

    • getTableDescriptorHash

      String getTableDescriptorHash()
      Returns a hash of the table descriptor that this region was opened with. This hash uniquely identifies the table configuration (column families, compression, TTL, block size, etc.) and can be used to determine if a region needs to be reopened to pick up descriptor changes.
      Returns:
      hex-encoded hash of the serialized TableDescriptor