Synchronize ticker and histogram metrics for Java API (#4733)

Summary:
Updating the `HistogramType.java` and `TickerType.java` to expose and correct metrics for statistics callbacks.

Moved `NO_ITERATOR_CREATED` to the proper stat name and deprecated `NO_ITERATORS`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4733

Differential Revision: D13466936

Pulled By: sagar0

fbshipit-source-id: a58d1edcc07c7b68c3525b1aa05828212c89c6c7

include/rocksdb/statistics.h

@@ -309,7 +309,7 @@ enum Tickers : uint32_t {
   // # of bytes in the blob files evicted because of BlobDB is full.
   BLOB_DB_FIFO_BYTES_EVICTED,
 
-  // These coutners indicate a performance issue in WritePrepared transactions.
+  // These counters indicate a performance issue in WritePrepared transactions.
   // We should not seem them ticking them much.
   // # of times prepare_mutex_ is acquired in the fast path.
   TXN_PREPARE_MUTEX_OVERHEAD,

java/rocksjni/portal.h

@@ -3380,12 +3380,97 @@ class TickerTypeJni {
       case rocksdb::Tickers::NUMBER_MULTIGET_KEYS_FOUND:
         return 0x5E;
       case rocksdb::Tickers::NO_ITERATOR_CREATED:
-        return 0x5F;
+        // -0x01 to fixate the new value that incorrectly changed TICKER_ENUM_MAX.
+        return -0x01;
       case rocksdb::Tickers::NO_ITERATOR_DELETED:
         return 0x60;
-      case rocksdb::Tickers::TICKER_ENUM_MAX:
+      case rocksdb::Tickers::COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE:
         return 0x61;
-
+      case rocksdb::Tickers::COMPACTION_CANCELLED:
+        return 0x62;
+      case rocksdb::Tickers::BLOOM_FILTER_FULL_POSITIVE:
+        return 0x63;
+      case rocksdb::Tickers::BLOOM_FILTER_FULL_TRUE_POSITIVE:
+        return 0x64;
+      case rocksdb::Tickers::BLOB_DB_NUM_PUT:
+        return 0x65;
+      case rocksdb::Tickers::BLOB_DB_NUM_WRITE:
+        return 0x66;
+      case rocksdb::Tickers::BLOB_DB_NUM_GET:
+        return 0x67;
+      case rocksdb::Tickers::BLOB_DB_NUM_MULTIGET:
+        return 0x68;
+      case rocksdb::Tickers::BLOB_DB_NUM_SEEK:
+        return 0x69;
+      case rocksdb::Tickers::BLOB_DB_NUM_NEXT:
+        return 0x6A;
+      case rocksdb::Tickers::BLOB_DB_NUM_PREV:
+        return 0x6B;
+      case rocksdb::Tickers::BLOB_DB_NUM_KEYS_WRITTEN:
+        return 0x6C;
+      case rocksdb::Tickers::BLOB_DB_NUM_KEYS_READ:
+        return 0x6D;
+      case rocksdb::Tickers::BLOB_DB_BYTES_WRITTEN:
+        return 0x6E;
+      case rocksdb::Tickers::BLOB_DB_BYTES_READ:
+        return 0x6F;
+      case rocksdb::Tickers::BLOB_DB_WRITE_INLINED:
+        return 0x70;
+      case rocksdb::Tickers::BLOB_DB_WRITE_INLINED_TTL:
+        return 0x71;
+      case rocksdb::Tickers::BLOB_DB_WRITE_BLOB:
+        return 0x72;
+      case rocksdb::Tickers::BLOB_DB_WRITE_BLOB_TTL:
+        return 0x73;
+      case rocksdb::Tickers::BLOB_DB_BLOB_FILE_BYTES_WRITTEN:
+        return 0x74;
+      case rocksdb::Tickers::BLOB_DB_BLOB_FILE_BYTES_READ:
+        return 0x75;
+      case rocksdb::Tickers::BLOB_DB_BLOB_FILE_SYNCED:
+        return 0x76;
+      case rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EXPIRED_COUNT:
+        return 0x77;
+      case rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EXPIRED_SIZE:
+        return 0x78;
+      case rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EVICTED_COUNT:
+        return 0x79;
+      case rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EVICTED_SIZE:
+        return 0x7A;
+      case rocksdb::Tickers::BLOB_DB_GC_NUM_FILES:
+        return 0x7B;
+      case rocksdb::Tickers::BLOB_DB_GC_NUM_NEW_FILES:
+        return 0x7C;
+      case rocksdb::Tickers::BLOB_DB_GC_FAILURES:
+        return 0x7D;
+      case rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_OVERWRITTEN:
+        return 0x7E;
+      case rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_EXPIRED:
+        return 0x7F;
+      case rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_RELOCATED:
+        return -0x02;
+      case rocksdb::Tickers::BLOB_DB_GC_BYTES_OVERWRITTEN:
+        return -0x03;
+      case rocksdb::Tickers::BLOB_DB_GC_BYTES_EXPIRED:
+        return -0x04;
+      case rocksdb::Tickers::BLOB_DB_GC_BYTES_RELOCATED:
+        return -0x05;
+      case rocksdb::Tickers::BLOB_DB_FIFO_NUM_FILES_EVICTED:
+        return -0x06;
+      case rocksdb::Tickers::BLOB_DB_FIFO_NUM_KEYS_EVICTED:
+        return -0x07;
+      case rocksdb::Tickers::BLOB_DB_FIFO_BYTES_EVICTED:
+        return -0x08;
+      case rocksdb::Tickers::TXN_PREPARE_MUTEX_OVERHEAD:
+        return -0x09;
+      case rocksdb::Tickers::TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD:
+        return -0x0A;
+      case rocksdb::Tickers::TXN_DUPLICATE_KEY_OVERHEAD:
+        return -0x0B;
+      case rocksdb::Tickers::TXN_SNAPSHOT_MUTEX_OVERHEAD:
+        return -0x0C;
+      case rocksdb::Tickers::TICKER_ENUM_MAX:
+        // 0x5F for backwards compatibility on current minor version.
+        return 0x5F;
       default:
         // undefined/default
         return 0x0;
@@ -3586,11 +3671,97 @@ class TickerTypeJni {
         return rocksdb::Tickers::NUMBER_ITER_SKIP;
       case 0x5E:
         return rocksdb::Tickers::NUMBER_MULTIGET_KEYS_FOUND;
-      case 0x5F:
+      case -0x01:
+        // -0x01 to fixate the new value that incorrectly changed TICKER_ENUM_MAX.
         return rocksdb::Tickers::NO_ITERATOR_CREATED;
       case 0x60:
         return rocksdb::Tickers::NO_ITERATOR_DELETED;
       case 0x61:
+        return rocksdb::Tickers::COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE;
+      case 0x62:
+        return rocksdb::Tickers::COMPACTION_CANCELLED;
+      case 0x63:
+        return rocksdb::Tickers::BLOOM_FILTER_FULL_POSITIVE;
+      case 0x64:
+        return rocksdb::Tickers::BLOOM_FILTER_FULL_TRUE_POSITIVE;
+      case 0x65:
+        return rocksdb::Tickers::BLOB_DB_NUM_PUT;
+      case 0x66:
+        return rocksdb::Tickers::BLOB_DB_NUM_WRITE;
+      case 0x67:
+        return rocksdb::Tickers::BLOB_DB_NUM_GET;
+      case 0x68:
+        return rocksdb::Tickers::BLOB_DB_NUM_MULTIGET;
+      case 0x69:
+        return rocksdb::Tickers::BLOB_DB_NUM_SEEK;
+      case 0x6A:
+        return rocksdb::Tickers::BLOB_DB_NUM_NEXT;
+      case 0x6B:
+        return rocksdb::Tickers::BLOB_DB_NUM_PREV;
+      case 0x6C:
+        return rocksdb::Tickers::BLOB_DB_NUM_KEYS_WRITTEN;
+      case 0x6D:
+        return rocksdb::Tickers::BLOB_DB_NUM_KEYS_READ;
+      case 0x6E:
+        return rocksdb::Tickers::BLOB_DB_BYTES_WRITTEN;
+      case 0x6F:
+        return rocksdb::Tickers::BLOB_DB_BYTES_READ;
+      case 0x70:
+        return rocksdb::Tickers::BLOB_DB_WRITE_INLINED;
+      case 0x71:
+        return rocksdb::Tickers::BLOB_DB_WRITE_INLINED_TTL;
+      case 0x72:
+        return rocksdb::Tickers::BLOB_DB_WRITE_BLOB;
+      case 0x73:
+        return rocksdb::Tickers::BLOB_DB_WRITE_BLOB_TTL;
+      case 0x74:
+        return rocksdb::Tickers::BLOB_DB_BLOB_FILE_BYTES_WRITTEN;
+      case 0x75:
+        return rocksdb::Tickers::BLOB_DB_BLOB_FILE_BYTES_READ;
+      case 0x76:
+        return rocksdb::Tickers::BLOB_DB_BLOB_FILE_SYNCED;
+      case 0x77:
+        return rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EXPIRED_COUNT;
+      case 0x78:
+        return rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EXPIRED_SIZE;
+      case 0x79:
+        return rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EVICTED_COUNT;
+      case 0x7A:
+        return rocksdb::Tickers::BLOB_DB_BLOB_INDEX_EVICTED_SIZE;
+      case 0x7B:
+        return rocksdb::Tickers::BLOB_DB_GC_NUM_FILES;
+      case 0x7C:
+        return rocksdb::Tickers::BLOB_DB_GC_NUM_NEW_FILES;
+      case 0x7D:
+        return rocksdb::Tickers::BLOB_DB_GC_FAILURES;
+      case 0x7E:
+        return rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_OVERWRITTEN;
+      case 0x7F:
+        return rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_EXPIRED;
+      case -0x02:
+        return rocksdb::Tickers::BLOB_DB_GC_NUM_KEYS_RELOCATED;
+      case -0x03:
+        return rocksdb::Tickers::BLOB_DB_GC_BYTES_OVERWRITTEN;
+      case -0x04:
+        return rocksdb::Tickers::BLOB_DB_GC_BYTES_EXPIRED;
+      case -0x05:
+        return rocksdb::Tickers::BLOB_DB_GC_BYTES_RELOCATED;
+      case -0x06:
+        return rocksdb::Tickers::BLOB_DB_FIFO_NUM_FILES_EVICTED;
+      case -0x07:
+        return rocksdb::Tickers::BLOB_DB_FIFO_NUM_KEYS_EVICTED;
+      case -0x08:
+        return rocksdb::Tickers::BLOB_DB_FIFO_BYTES_EVICTED;
+      case -0x09:
+        return rocksdb::Tickers::TXN_PREPARE_MUTEX_OVERHEAD;
+      case -0x0A:
+        return rocksdb::Tickers::TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD;
+      case -0x0B:
+        return rocksdb::Tickers::TXN_DUPLICATE_KEY_OVERHEAD;
+      case -0x0C:
+        return rocksdb::Tickers::TXN_SNAPSHOT_MUTEX_OVERHEAD;
+      case 0x5F:
+        // 0x5F for backwards compatibility on current minor version.
         return rocksdb::Tickers::TICKER_ENUM_MAX;
 
       default:
@@ -3670,10 +3841,40 @@ class HistogramTypeJni {
         return 0x1D;
       case rocksdb::Histograms::READ_NUM_MERGE_OPERANDS:
         return 0x1E;
+      // 0x20 to skip 0x1F so TICKER_ENUM_MAX remains unchanged for minor version compatibility.
       case rocksdb::Histograms::FLUSH_TIME:
-        return 0x1F;
-      case rocksdb::Histograms::HISTOGRAM_ENUM_MAX:
         return 0x20;
+      case rocksdb::Histograms::BLOB_DB_KEY_SIZE:
+        return 0x21;
+      case rocksdb::Histograms::BLOB_DB_VALUE_SIZE:
+        return 0x22;
+      case rocksdb::Histograms::BLOB_DB_WRITE_MICROS:
+        return 0x23;
+      case rocksdb::Histograms::BLOB_DB_GET_MICROS:
+        return 0x24;
+      case rocksdb::Histograms::BLOB_DB_MULTIGET_MICROS:
+        return 0x25;
+      case rocksdb::Histograms::BLOB_DB_SEEK_MICROS:
+        return 0x26;
+      case rocksdb::Histograms::BLOB_DB_NEXT_MICROS:
+        return 0x27;
+      case rocksdb::Histograms::BLOB_DB_PREV_MICROS:
+        return 0x28;
+      case rocksdb::Histograms::BLOB_DB_BLOB_FILE_WRITE_MICROS:
+        return 0x29;
+      case rocksdb::Histograms::BLOB_DB_BLOB_FILE_READ_MICROS:
+        return 0x2A;
+      case rocksdb::Histograms::BLOB_DB_BLOB_FILE_SYNC_MICROS:
+        return 0x2B;
+      case rocksdb::Histograms::BLOB_DB_GC_MICROS:
+        return 0x2C;
+      case rocksdb::Histograms::BLOB_DB_COMPRESSION_MICROS:
+        return 0x2D;
+      case rocksdb::Histograms::BLOB_DB_DECOMPRESSION_MICROS:
+        return 0x2E;
+      case rocksdb::Histograms::HISTOGRAM_ENUM_MAX:
+        // 0x1F for backwards compatibility on current minor version.
+        return 0x1F;
 
       default:
         // undefined/default
@@ -3747,9 +3948,39 @@ class HistogramTypeJni {
         return rocksdb::Histograms::DECOMPRESSION_TIMES_NANOS;
       case 0x1E:
         return rocksdb::Histograms::READ_NUM_MERGE_OPERANDS;
-      case 0x1F:
-        return rocksdb::Histograms::FLUSH_TIME;
+      // 0x20 to skip 0x1F so TICKER_ENUM_MAX remains unchanged for minor version compatibility.
       case 0x20:
+        return rocksdb::Histograms::FLUSH_TIME;
+      case 0x21:
+        return rocksdb::Histograms::BLOB_DB_KEY_SIZE;
+      case 0x22:
+        return rocksdb::Histograms::BLOB_DB_VALUE_SIZE;
+      case 0x23:
+        return rocksdb::Histograms::BLOB_DB_WRITE_MICROS;
+      case 0x24:
+        return rocksdb::Histograms::BLOB_DB_GET_MICROS;
+      case 0x25:
+        return rocksdb::Histograms::BLOB_DB_MULTIGET_MICROS;
+      case 0x26:
+        return rocksdb::Histograms::BLOB_DB_SEEK_MICROS;
+      case 0x27:
+        return rocksdb::Histograms::BLOB_DB_NEXT_MICROS;
+      case 0x28:
+        return rocksdb::Histograms::BLOB_DB_PREV_MICROS;
+      case 0x29:
+        return rocksdb::Histograms::BLOB_DB_BLOB_FILE_WRITE_MICROS;
+      case 0x2A:
+        return rocksdb::Histograms::BLOB_DB_BLOB_FILE_READ_MICROS;
+      case 0x2B:
+        return rocksdb::Histograms::BLOB_DB_BLOB_FILE_SYNC_MICROS;
+      case 0x2C:
+        return rocksdb::Histograms::BLOB_DB_GC_MICROS;
+      case 0x2D:
+        return rocksdb::Histograms::BLOB_DB_COMPRESSION_MICROS;
+      case 0x2E:
+        return rocksdb::Histograms::BLOB_DB_DECOMPRESSION_MICROS;
+      case 0x1F:
+        // 0x1F for backwards compatibility on current minor version.
         return rocksdb::Histograms::HISTOGRAM_ENUM_MAX;
 
       default:

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

@@ -84,6 +84,82 @@ public enum HistogramType {
 
   READ_NUM_MERGE_OPERANDS((byte) 0x1E),
 
+  /**
+   * Time spent flushing memtable to disk.
+   */
+  FLUSH_TIME((byte) 0x20),
+
+  /**
+   * Size of keys written to BlobDB.
+   */
+  BLOB_DB_KEY_SIZE((byte) 0x21),
+
+  /**
+   * Size of values written to BlobDB.
+   */
+  BLOB_DB_VALUE_SIZE((byte) 0x22),
+
+  /**
+   * BlobDB Put/PutWithTTL/PutUntil/Write latency.
+   */
+  BLOB_DB_WRITE_MICROS((byte) 0x23),
+
+  /**
+   * BlobDB Get lagency.
+   */
+  BLOB_DB_GET_MICROS((byte) 0x24),
+
+  /**
+   * BlobDB MultiGet latency.
+   */
+  BLOB_DB_MULTIGET_MICROS((byte) 0x25),
+
+  /**
+   * BlobDB Seek/SeekToFirst/SeekToLast/SeekForPrev latency.
+   */
+  BLOB_DB_SEEK_MICROS((byte) 0x26),
+
+  /**
+   * BlobDB Next latency.
+   */
+  BLOB_DB_NEXT_MICROS((byte) 0x27),
+
+  /**
+   * BlobDB Prev latency.
+   */
+  BLOB_DB_PREV_MICROS((byte) 0x28),
+
+  /**
+   * Blob file write latency.
+   */
+  BLOB_DB_BLOB_FILE_WRITE_MICROS((byte) 0x29),
+
+  /**
+   * Blob file read latency.
+   */
+  BLOB_DB_BLOB_FILE_READ_MICROS((byte) 0x2A),
+
+  /**
+   * Blob file sync latency.
+   */
+  BLOB_DB_BLOB_FILE_SYNC_MICROS((byte) 0x2B),
+
+  /**
+   * BlobDB garbage collection time.
+   */
+  BLOB_DB_GC_MICROS((byte) 0x2C),
+
+  /**
+   * BlobDB compression time.
+   */
+  BLOB_DB_COMPRESSION_MICROS((byte) 0x2D),
+
+  /**
+   * BlobDB decompression time.
+   */
+  BLOB_DB_DECOMPRESSION_MICROS((byte) 0x2E),
+
+  // 0x1F for backwards compatibility on current minor version.
   HISTOGRAM_ENUM_MAX((byte) 0x1F);
 
   private final byte value;
@@ -92,6 +168,12 @@ public enum HistogramType {
     this.value = value;
   }
 
+  /**
+   * @deprecated
+   * Exposes internal value of native enum mappings. This method will be marked private in the
+   * next major release.
+   */
+  @Deprecated
   public byte getValue() {
     return value;
   }

java/src/main/java/org/rocksdb/TickerType.java

@@ -5,6 +5,16 @@
 
 package org.rocksdb;
 
+/**
+ * The logical mapping of tickers defined in rocksdb::Tickers.
+ *
+ * Java byte value mappings don't align 1:1 to the c++ values. c++ rocksdb::Tickers enumeration type
+ * is uint32_t and java org.rocksdb.TickerType is byte, this causes mapping issues when
+ * rocksdb::Tickers value is greater then 127 (0x7F) for jbyte jni interface as range greater is not
+ * available. Without breaking interface in minor versions, value mappings for
+ * org.rocksdb.TickerType leverage full byte range [-128 (-0x80), (0x7F)]. Newer tickers added
+ * should descend into negative values until TICKER_ENUM_MAX reaches -128 (-0x80).
+ */
 public enum TickerType {
 
     /**
@@ -305,8 +315,9 @@ public enum TickerType {
 
     /**
      * Number of iterators created.
+     *
      */
-    NO_ITERATOR_CREATED((byte) 0x38),
+    NO_ITERATORS((byte) 0x38),
 
     /**
      * Number of MultiGet calls.
@@ -475,13 +486,238 @@ public enum TickerType {
      */
     NUMBER_MULTIGET_KEYS_FOUND((byte) 0x5E),
 
+    // -0x01 to fixate the new value that incorrectly changed TICKER_ENUM_MAX
+    /**
+     * Number of iterators created.
+     */
+    NO_ITERATOR_CREATED((byte) -0x01),
+
     /**
      * Number of iterators deleted.
      */
-    NO_ITERATOR_DELETED((byte) 0x5F),
+    NO_ITERATOR_DELETED((byte) 0x60),
+
+    /**
+     * Deletions obsoleted before bottom level due to file gap optimization.
+     */
+    COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE((byte) 0x61),
+
+    /**
+     * If a compaction was cancelled in sfm to prevent ENOSPC
+     */
+    COMPACTION_CANCELLED((byte) 0x62),
+
+    /**
+     * # of times bloom FullFilter has not avoided the reads.
+     */
+    BLOOM_FILTER_FULL_POSITIVE((byte) 0x63),
+
+    /**
+     * # of times bloom FullFilter has not avoided the reads and data actually
+     * exist.
+     */
+    BLOOM_FILTER_FULL_TRUE_POSITIVE((byte) 0x64),
+
+    /**
+     * BlobDB specific stats
+     * # of Put/PutTTL/PutUntil to BlobDB.
+     */
+    BLOB_DB_NUM_PUT((byte) 0x65),
+
+    /**
+     * # of Write to BlobDB.
+     */
+    BLOB_DB_NUM_WRITE((byte) 0x66),
+
+    /**
+     * # of Get to BlobDB.
+     */
+    BLOB_DB_NUM_GET((byte) 0x67),
+
+    /**
+     * # of MultiGet to BlobDB.
+     */
+    BLOB_DB_NUM_MULTIGET((byte) 0x68),
+
+    /**
+     * # of Seek/SeekToFirst/SeekToLast/SeekForPrev to BlobDB iterator.
+     */
+    BLOB_DB_NUM_SEEK((byte) 0x69),
+
+    /**
+     * # of Next to BlobDB iterator.
+     */
+    BLOB_DB_NUM_NEXT((byte) 0x6A),
+
+    /**
+     * # of Prev to BlobDB iterator.
+     */
+    BLOB_DB_NUM_PREV((byte) 0x6B),
+
+    /**
+     * # of keys written to BlobDB.
+     */
+    BLOB_DB_NUM_KEYS_WRITTEN((byte) 0x6C),
+
+    /**
+     * # of keys read from BlobDB.
+     */
+    BLOB_DB_NUM_KEYS_READ((byte) 0x6D),
+
+    /**
+     * # of bytes (key + value) written to BlobDB.
+     */
+    BLOB_DB_BYTES_WRITTEN((byte) 0x6E),
+
+    /**
+     * # of bytes (keys + value) read from BlobDB.
+     */
+    BLOB_DB_BYTES_READ((byte) 0x6F),
+
+    /**
+     * # of keys written by BlobDB as non-TTL inlined value.
+     */
+    BLOB_DB_WRITE_INLINED((byte) 0x70),
+
+    /**
+     * # of keys written by BlobDB as TTL inlined value.
+     */
+    BLOB_DB_WRITE_INLINED_TTL((byte) 0x71),
+
+    /**
+     * # of keys written by BlobDB as non-TTL blob value.
+     */
+    BLOB_DB_WRITE_BLOB((byte) 0x72),
+
+    /**
+     * # of keys written by BlobDB as TTL blob value.
+     */
+    BLOB_DB_WRITE_BLOB_TTL((byte) 0x73),
+
+    /**
+     * # of bytes written to blob file.
+     */
+    BLOB_DB_BLOB_FILE_BYTES_WRITTEN((byte) 0x74),
+
+    /**
+     * # of bytes read from blob file.
+     */
+    BLOB_DB_BLOB_FILE_BYTES_READ((byte) 0x75),
+
+    /**
+     * # of times a blob files being synced.
+     */
+    BLOB_DB_BLOB_FILE_SYNCED((byte) 0x76),
+
+    /**
+     * # of blob index evicted from base DB by BlobDB compaction filter because
+     * of expiration.
+     */
+    BLOB_DB_BLOB_INDEX_EXPIRED_COUNT((byte) 0x77),
+
+    /**
+     * Size of blob index evicted from base DB by BlobDB compaction filter
+     * because of expiration.
+     */
+    BLOB_DB_BLOB_INDEX_EXPIRED_SIZE((byte) 0x78),
+
+    /**
+     * # of blob index evicted from base DB by BlobDB compaction filter because
+     * of corresponding file deleted.
+     */
+    BLOB_DB_BLOB_INDEX_EVICTED_COUNT((byte) 0x79),
+
+    /**
+     * Size of blob index evicted from base DB by BlobDB compaction filter
+     * because of corresponding file deleted.
+     */
+    BLOB_DB_BLOB_INDEX_EVICTED_SIZE((byte) 0x7A),
+
+    /**
+     * # of blob files being garbage collected.
+     */
+    BLOB_DB_GC_NUM_FILES((byte) 0x7B),
 
-    TICKER_ENUM_MAX((byte) 0x60);
+    /**
+     * # of blob files generated by garbage collection.
+     */
+    BLOB_DB_GC_NUM_NEW_FILES((byte) 0x7C),
 
+    /**
+     * # of BlobDB garbage collection failures.
+     */
+    BLOB_DB_GC_FAILURES((byte) 0x7D),
+
+    /**
+     * # of keys drop by BlobDB garbage collection because they had been
+     * overwritten.
+     */
+    BLOB_DB_GC_NUM_KEYS_OVERWRITTEN((byte) 0x7E),
+
+    /**
+     * # of keys drop by BlobDB garbage collection because of expiration.
+     */
+    BLOB_DB_GC_NUM_KEYS_EXPIRED((byte) 0x7F),
+
+    /**
+     * # of keys relocated to new blob file by garbage collection.
+     */
+    BLOB_DB_GC_NUM_KEYS_RELOCATED((byte) -0x02),
+
+    /**
+     * # of bytes drop by BlobDB garbage collection because they had been
+     * overwritten.
+     */
+    BLOB_DB_GC_BYTES_OVERWRITTEN((byte) -0x03),
+
+    /**
+     * # of bytes drop by BlobDB garbage collection because of expiration.
+     */
+    BLOB_DB_GC_BYTES_EXPIRED((byte) -0x04),
+
+    /**
+     * # of bytes relocated to new blob file by garbage collection.
+     */
+    BLOB_DB_GC_BYTES_RELOCATED((byte) -0x05),
+
+    /**
+     * # of blob files evicted because of BlobDB is full.
+     */
+    BLOB_DB_FIFO_NUM_FILES_EVICTED((byte) -0x06),
+
+    /**
+     * # of keys in the blob files evicted because of BlobDB is full.
+     */
+    BLOB_DB_FIFO_NUM_KEYS_EVICTED((byte) -0x07),
+
+    /**
+     * # of bytes in the blob files evicted because of BlobDB is full.
+     */
+    BLOB_DB_FIFO_BYTES_EVICTED((byte) -0x08),
+
+    /**
+     * These counters indicate a performance issue in WritePrepared transactions.
+     * We should not seem them ticking them much.
+     * # of times prepare_mutex_ is acquired in the fast path.
+     */
+    TXN_PREPARE_MUTEX_OVERHEAD((byte) -0x09),
+
+    /**
+     * # of times old_commit_map_mutex_ is acquired in the fast path.
+     */
+    TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD((byte) -0x0A),
+
+    /**
+     * # of times we checked a batch for duplicate keys.
+     */
+    TXN_DUPLICATE_KEY_OVERHEAD((byte) -0x0B),
+
+    /**
+     * # of times snapshot_mutex_ is acquired in the fast path.
+     */
+    TXN_SNAPSHOT_MUTEX_OVERHEAD((byte) -0x0C),
+
+    TICKER_ENUM_MAX((byte) 0x5F);
 
     private final byte value;
 
@@ -489,6 +725,12 @@ public enum TickerType {
         this.value = value;
     }
 
+    /**
+     * @deprecated
+     * Exposes internal value of native enum mappings. This method will be marked private in the
+     * next major release.
+     */
+    @Deprecated
     public byte getValue() {
         return value;
     }