content: // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
  //  This source code is licensed under both the GPLv2 (found in the
  //  COPYING file in the root directory) and Apache 2.0 License
  //  (found in the LICENSE.Apache file in the root directory).
  
  package org.rocksdb;
  
  public enum HistogramType {
  
    DB_GET((byte) 0x0),
  
    DB_WRITE((byte) 0x1),
  
    COMPACTION_TIME((byte) 0x2),
  
    SUBCOMPACTION_SETUP_TIME((byte) 0x3),
  
    TABLE_SYNC_MICROS((byte) 0x4),
  
    COMPACTION_OUTFILE_SYNC_MICROS((byte) 0x5),
  
    WAL_FILE_SYNC_MICROS((byte) 0x6),
  
    MANIFEST_FILE_SYNC_MICROS((byte) 0x7),
  
    /**
     * TIME SPENT IN IO DURING TABLE OPEN.
     */
    TABLE_OPEN_IO_MICROS((byte) 0x8),
  
    DB_MULTIGET((byte) 0x9),
  
    READ_BLOCK_COMPACTION_MICROS((byte) 0xA),
  
    READ_BLOCK_GET_MICROS((byte) 0xB),
  
    WRITE_RAW_BLOCK_MICROS((byte) 0xC),
  
    STALL_L0_SLOWDOWN_COUNT((byte) 0xD),
  
    STALL_MEMTABLE_COMPACTION_COUNT((byte) 0xE),
  
    STALL_L0_NUM_FILES_COUNT((byte) 0xF),
  
    HARD_RATE_LIMIT_DELAY_COUNT((byte) 0x10),
  
    SOFT_RATE_LIMIT_DELAY_COUNT((byte) 0x11),
  
    NUM_FILES_IN_SINGLE_COMPACTION((byte) 0x12),
  
    DB_SEEK((byte) 0x13),
  
    WRITE_STALL((byte) 0x14),
  
    SST_READ_MICROS((byte) 0x15),
  
    /**
     * The number of subcompactions actually scheduled during a compaction.
     */
    NUM_SUBCOMPACTIONS_SCHEDULED((byte) 0x16),
  
    /**
     * Value size distribution in each operation.
     */
    BYTES_PER_READ((byte) 0x17),
    BYTES_PER_WRITE((byte) 0x18),
    BYTES_PER_MULTIGET((byte) 0x19),
  
    /**
     * number of bytes compressed.
     */
    BYTES_COMPRESSED((byte) 0x1A),
  
    /**
     * number of bytes decompressed.
     *
     * number of bytes is when uncompressed; i.e. before/after respectively
     */
    BYTES_DECOMPRESSED((byte) 0x1B),
  
    COMPRESSION_TIMES_NANOS((byte) 0x1C),
  
    DECOMPRESSION_TIMES_NANOS((byte) 0x1D),
  
    READ_NUM_MERGE_OPERANDS((byte) 0x1E),
  
    HISTOGRAM_ENUM_MAX((byte) 0x1F);
  
    private final byte value;
  
    HistogramType(final byte value) {
      this.value = value;
    }
  
    public byte getValue() {
      return value;
    }
  }
  