ceph/src/rocksdb/java/src/main/java/org/rocksdb/HistogramType.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 package org.rocksdb;
   7
   8 public enum HistogramType {
   9
  10   DB_GET((byte) 0x0),
  11
  12   DB_WRITE((byte) 0x1),
  13
  14   COMPACTION_TIME((byte) 0x2),
  15
  16   SUBCOMPACTION_SETUP_TIME((byte) 0x3),
  17
  18   TABLE_SYNC_MICROS((byte) 0x4),
  19
  20   COMPACTION_OUTFILE_SYNC_MICROS((byte) 0x5),
  21
  22   WAL_FILE_SYNC_MICROS((byte) 0x6),
  23
  24   MANIFEST_FILE_SYNC_MICROS((byte) 0x7),
  25
  26   /**
  27    * TIME SPENT IN IO DURING TABLE OPEN.
  28    */
  29   TABLE_OPEN_IO_MICROS((byte) 0x8),
  30
  31   DB_MULTIGET((byte) 0x9),
  32
  33   READ_BLOCK_COMPACTION_MICROS((byte) 0xA),
  34
  35   READ_BLOCK_GET_MICROS((byte) 0xB),
  36
  37   WRITE_RAW_BLOCK_MICROS((byte) 0xC),
  38
  39   STALL_L0_SLOWDOWN_COUNT((byte) 0xD),
  40
  41   STALL_MEMTABLE_COMPACTION_COUNT((byte) 0xE),
  42
  43   STALL_L0_NUM_FILES_COUNT((byte) 0xF),
  44
  45   HARD_RATE_LIMIT_DELAY_COUNT((byte) 0x10),
  46
  47   SOFT_RATE_LIMIT_DELAY_COUNT((byte) 0x11),
  48
  49   NUM_FILES_IN_SINGLE_COMPACTION((byte) 0x12),
  50
  51   DB_SEEK((byte) 0x13),
  52
  53   WRITE_STALL((byte) 0x14),
  54
  55   SST_READ_MICROS((byte) 0x15),
  56
  57   /**
  58    * The number of subcompactions actually scheduled during a compaction.
  59    */
  60   NUM_SUBCOMPACTIONS_SCHEDULED((byte) 0x16),
  61
  62   /**
  63    * Value size distribution in each operation.
  64    */
  65   BYTES_PER_READ((byte) 0x17),
  66   BYTES_PER_WRITE((byte) 0x18),
  67   BYTES_PER_MULTIGET((byte) 0x19),
  68
  69   /**
  70    * number of bytes compressed.
  71    */
  72   BYTES_COMPRESSED((byte) 0x1A),
  73
  74   /**
  75    * number of bytes decompressed.
  76    *
  77    * number of bytes is when uncompressed; i.e. before/after respectively
  78    */
  79   BYTES_DECOMPRESSED((byte) 0x1B),
  80
  81   COMPRESSION_TIMES_NANOS((byte) 0x1C),
  82
  83   DECOMPRESSION_TIMES_NANOS((byte) 0x1D),
  84
  85   READ_NUM_MERGE_OPERANDS((byte) 0x1E),
  86
  87   /**
  88    * Time spent flushing memtable to disk.
  89    */
  90   FLUSH_TIME((byte) 0x20),
  91
  92   /**
  93    * Size of keys written to BlobDB.
  94    */
  95   BLOB_DB_KEY_SIZE((byte) 0x21),
  96
  97   /**
  98    * Size of values written to BlobDB.
  99    */
 100   BLOB_DB_VALUE_SIZE((byte) 0x22),
 101
 102   /**
 103    * BlobDB Put/PutWithTTL/PutUntil/Write latency.
 104    */
 105   BLOB_DB_WRITE_MICROS((byte) 0x23),
 106
 107   /**
 108    * BlobDB Get lagency.
 109    */
 110   BLOB_DB_GET_MICROS((byte) 0x24),
 111
 112   /**
 113    * BlobDB MultiGet latency.
 114    */
 115   BLOB_DB_MULTIGET_MICROS((byte) 0x25),
 116
 117   /**
 118    * BlobDB Seek/SeekToFirst/SeekToLast/SeekForPrev latency.
 119    */
 120   BLOB_DB_SEEK_MICROS((byte) 0x26),
 121
 122   /**
 123    * BlobDB Next latency.
 124    */
 125   BLOB_DB_NEXT_MICROS((byte) 0x27),
 126
 127   /**
 128    * BlobDB Prev latency.
 129    */
 130   BLOB_DB_PREV_MICROS((byte) 0x28),
 131
 132   /**
 133    * Blob file write latency.
 134    */
 135   BLOB_DB_BLOB_FILE_WRITE_MICROS((byte) 0x29),
 136
 137   /**
 138    * Blob file read latency.
 139    */
 140   BLOB_DB_BLOB_FILE_READ_MICROS((byte) 0x2A),
 141
 142   /**
 143    * Blob file sync latency.
 144    */
 145   BLOB_DB_BLOB_FILE_SYNC_MICROS((byte) 0x2B),
 146
 147   /**
 148    * BlobDB garbage collection time.
 149    */
 150   BLOB_DB_GC_MICROS((byte) 0x2C),
 151
 152   /**
 153    * BlobDB compression time.
 154    */
 155   BLOB_DB_COMPRESSION_MICROS((byte) 0x2D),
 156
 157   /**
 158    * BlobDB decompression time.
 159    */
 160   BLOB_DB_DECOMPRESSION_MICROS((byte) 0x2E),
 161
 162   /**
 163    * Num of Index and Filter blocks read from file system per level in MultiGet
 164    * request
 165    */
 166   NUM_INDEX_AND_FILTER_BLOCKS_READ_PER_LEVEL((byte) 0x2F),
 167
 168   /**
 169    * Num of Data blocks read from file system per level in MultiGet request.
 170    */
 171   NUM_DATA_BLOCKS_READ_PER_LEVEL((byte) 0x30),
 172
 173   /**
 174    * Num of SST files read from file system per level in MultiGet request.
 175    */
 176   NUM_SST_READ_PER_LEVEL((byte) 0x31),
 177
 178   /**
 179    * The number of retry in auto resume
 180    */
 181   ERROR_HANDLER_AUTORESUME_RETRY_COUNT((byte) 0x32),
 182
 183   ASYNC_READ_BYTES((byte) 0x33),
 184
 185   // 0x1F for backwards compatibility on current minor version.
 186   HISTOGRAM_ENUM_MAX((byte) 0x1F);
 187
 188   private final byte value;
 189
 190   HistogramType(final byte value) {
 191     this.value = value;
 192   }
 193
 194   /**
 195    * Returns the byte value of the enumerations value
 196    *
 197    * @return byte representation
 198    */
 199   public byte getValue() {
 200     return value;
 201   }
 202
 203   /**
 204    * Get Histogram type by byte value.
 205    *
 206    * @param value byte representation of HistogramType.
 207    *
 208    * @return {@link org.rocksdb.HistogramType} instance.
 209    * @throws java.lang.IllegalArgumentException if an invalid
 210    *     value is provided.
 211    */
 212   public static HistogramType getHistogramType(final byte value) {
 213     for (final HistogramType histogramType : HistogramType.values()) {
 214       if (histogramType.getValue() == value) {
 215         return histogramType;
 216       }
 217     }
 218     throw new IllegalArgumentException(
 219         "Illegal value provided for HistogramType.");
 220   }
 221 }