Igor Canadi
11 years ago
commit
35c968f3a5
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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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package org.rocksdb; |
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public class HistogramData { |
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private final double median_; |
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private final double percentile95_; |
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private final double percentile99_; |
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private final double average_; |
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private final double standardDeviation_; |
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public HistogramData(double median, double percentile95, |
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double percentile99, double average, double standardDeviation) { |
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median_ = median; |
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percentile95_ = percentile95; |
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percentile99_ = percentile99; |
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average_ = average; |
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standardDeviation_ = standardDeviation; |
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} |
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public double getMedian() { |
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return median_; |
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} |
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public double getPercentile95() { |
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return percentile95_; |
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} |
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public double getPercentile99() { |
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return percentile99_; |
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} |
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public double getAverage() { |
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return average_; |
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} |
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public double getStandardDeviation() { |
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return standardDeviation_; |
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} |
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} |
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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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package org.rocksdb; |
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public enum HistogramType { |
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DB_GET(0), |
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DB_WRITE(1), |
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COMPACTION_TIME(2), |
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TABLE_SYNC_MICROS(3), |
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COMPACTION_OUTFILE_SYNC_MICROS(4), |
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WAL_FILE_SYNC_MICROS(5), |
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MANIFEST_FILE_SYNC_MICROS(6), |
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// TIME SPENT IN IO DURING TABLE OPEN
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TABLE_OPEN_IO_MICROS(7), |
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DB_MULTIGET(8), |
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READ_BLOCK_COMPACTION_MICROS(9), |
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READ_BLOCK_GET_MICROS(10), |
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WRITE_RAW_BLOCK_MICROS(11), |
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STALL_L0_SLOWDOWN_COUNT(12), |
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STALL_MEMTABLE_COMPACTION_COUNT(13), |
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STALL_L0_NUM_FILES_COUNT(14), |
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HARD_RATE_LIMIT_DELAY_COUNT(15), |
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SOFT_RATE_LIMIT_DELAY_COUNT(16), |
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NUM_FILES_IN_SINGLE_COMPACTION(17); |
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private final int value_; |
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private HistogramType(int value) { |
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value_ = value; |
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} |
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public int getValue() { |
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return value_; |
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} |
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} |
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@ -0,0 +1,38 @@ |
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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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package org.rocksdb; |
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/** |
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* Statistics to analyze the performance of a db. Pointer for statistics object |
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* is managed by Options class. |
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*/ |
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public class Statistics { |
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private final long statsHandle_; |
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public Statistics(long statsHandle) { |
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statsHandle_ = statsHandle; |
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} |
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public long getTickerCount(TickerType tickerType) { |
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assert(isInitialized()); |
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return getTickerCount0(tickerType.getValue(), statsHandle_); |
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} |
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public HistogramData geHistogramData(HistogramType histogramType) { |
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assert(isInitialized()); |
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HistogramData hist = geHistogramData0( |
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histogramType.getValue(), statsHandle_); |
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return hist; |
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} |
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private boolean isInitialized() { |
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return (statsHandle_ != 0); |
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} |
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private native long getTickerCount0(int tickerType, long handle); |
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private native HistogramData geHistogramData0(int histogramType, long handle); |
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} |
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@ -0,0 +1,123 @@ |
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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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package org.rocksdb; |
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public enum TickerType { |
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// total block cache misses
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// REQUIRES: BLOCK_CACHE_MISS == BLOCK_CACHE_INDEX_MISS +
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// BLOCK_CACHE_FILTER_MISS +
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// BLOCK_CACHE_DATA_MISS;
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BLOCK_CACHE_MISS(0), |
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// total block cache hit
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// REQUIRES: BLOCK_CACHE_HIT == BLOCK_CACHE_INDEX_HIT +
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// BLOCK_CACHE_FILTER_HIT +
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// BLOCK_CACHE_DATA_HIT;
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BLOCK_CACHE_HIT(1), |
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// # of blocks added to block cache.
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BLOCK_CACHE_ADD(2), |
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// # of times cache miss when accessing index block from block cache.
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BLOCK_CACHE_INDEX_MISS(3), |
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// # of times cache hit when accessing index block from block cache.
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BLOCK_CACHE_INDEX_HIT(4), |
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// # of times cache miss when accessing filter block from block cache.
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BLOCK_CACHE_FILTER_MISS(5), |
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// # of times cache hit when accessing filter block from block cache.
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BLOCK_CACHE_FILTER_HIT(6), |
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// # of times cache miss when accessing data block from block cache.
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BLOCK_CACHE_DATA_MISS(7), |
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// # of times cache hit when accessing data block from block cache.
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BLOCK_CACHE_DATA_HIT(8), |
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// # of times bloom filter has avoided file reads.
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BLOOM_FILTER_USEFUL(9), |
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// # of memtable hits.
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MEMTABLE_HIT(10), |
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// # of memtable misses.
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MEMTABLE_MISS(11), |
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/** |
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* COMPACTION_KEY_DROP_* count the reasons for key drop during compaction |
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* There are 3 reasons currently. |
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*/ |
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COMPACTION_KEY_DROP_NEWER_ENTRY(12), // key was written with a newer value.
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COMPACTION_KEY_DROP_OBSOLETE(13), // The key is obsolete.
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COMPACTION_KEY_DROP_USER(14), // user compaction function has dropped the key.
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// Number of keys written to the database via the Put and Write call's
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NUMBER_KEYS_WRITTEN(15), |
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// Number of Keys read,
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NUMBER_KEYS_READ(16), |
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// Number keys updated, if inplace update is enabled
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NUMBER_KEYS_UPDATED(17), |
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// Bytes written / read
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BYTES_WRITTEN(18), |
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BYTES_READ(19), |
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NO_FILE_CLOSES(20), |
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NO_FILE_OPENS(21), |
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NO_FILE_ERRORS(22), |
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// Time system had to wait to do LO-L1 compactions
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STALL_L0_SLOWDOWN_MICROS(23), |
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// Time system had to wait to move memtable to L1.
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STALL_MEMTABLE_COMPACTION_MICROS(24), |
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// write throttle because of too many files in L0
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STALL_L0_NUM_FILES_MICROS(25), |
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RATE_LIMIT_DELAY_MILLIS(26), |
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NO_ITERATORS(27), // number of iterators currently open
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// Number of MultiGet calls, keys read, and bytes read
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NUMBER_MULTIGET_CALLS(28), |
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NUMBER_MULTIGET_KEYS_READ(29), |
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NUMBER_MULTIGET_BYTES_READ(30), |
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// Number of deletes records that were not required to be
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// written to storage because key does not exist
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NUMBER_FILTERED_DELETES(31), |
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NUMBER_MERGE_FAILURES(32), |
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SEQUENCE_NUMBER(33), |
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// number of times bloom was checked before creating iterator on a
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// file, and the number of times the check was useful in avoiding
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// iterator creation (and thus likely IOPs).
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BLOOM_FILTER_PREFIX_CHECKED(34), |
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BLOOM_FILTER_PREFIX_USEFUL(35), |
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// Number of times we had to reseek inside an iteration to skip
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// over large number of keys with same userkey.
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NUMBER_OF_RESEEKS_IN_ITERATION(36), |
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// Record the number of calls to GetUpadtesSince. Useful to keep track of
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// transaction log iterator refreshes
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GET_UPDATES_SINCE_CALLS(37), |
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BLOCK_CACHE_COMPRESSED_MISS(38), // miss in the compressed block cache
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BLOCK_CACHE_COMPRESSED_HIT(39), // hit in the compressed block cache
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WAL_FILE_SYNCED(40), // Number of times WAL sync is done
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WAL_FILE_BYTES(41), // Number of bytes written to WAL
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// Writes can be processed by requesting thread or by the thread at the
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// head of the writers queue.
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WRITE_DONE_BY_SELF(42), |
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WRITE_DONE_BY_OTHER(43), |
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WRITE_WITH_WAL(44), // Number of Write calls that request WAL
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COMPACT_READ_BYTES(45), // Bytes read during compaction
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COMPACT_WRITE_BYTES(46), // Bytes written during compaction
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// Number of table's properties loaded directly from file, without creating
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// table reader object.
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NUMBER_DIRECT_LOAD_TABLE_PROPERTIES(47), |
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NUMBER_SUPERVERSION_ACQUIRES(48), |
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NUMBER_SUPERVERSION_RELEASES(49), |
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NUMBER_SUPERVERSION_CLEANUPS(50); |
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private final int value_; |
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private TickerType(int value) { |
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value_ = value; |
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} |
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public int getValue() { |
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return value_; |
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} |
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} |
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@ -0,0 +1,51 @@ |
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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// This file implements the "bridge" between Java and C++ and enables
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// calling c++ rocksdb::Statistics methods from Java side.
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <jni.h> |
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#include "include/org_rocksdb_Statistics.h" |
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#include "rocksjni/portal.h" |
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#include "rocksdb/statistics.h" |
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#include <iostream> |
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/*
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* Class: org_rocksdb_Statistics |
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* Method: getTickerCount0 |
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* Signature: (IJ)J |
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*/ |
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jlong Java_org_rocksdb_Statistics_getTickerCount0( |
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JNIEnv* env, jobject jobj, int tickerType, jlong handle) { |
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auto st = reinterpret_cast<rocksdb::Statistics*>(handle); |
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assert(st != nullptr); |
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return st->getTickerCount(static_cast<rocksdb::Tickers>(tickerType)); |
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} |
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/*
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* Class: org_rocksdb_Statistics |
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* Method: geHistogramData0 |
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* Signature: (IJ)Lorg/rocksdb/HistogramData; |
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*/ |
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jobject Java_org_rocksdb_Statistics_geHistogramData0( |
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JNIEnv* env, jobject jobj, int histogramType, jlong handle) { |
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auto st = reinterpret_cast<rocksdb::Statistics*>(handle); |
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assert(st != nullptr); |
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rocksdb::HistogramData data; |
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st->histogramData(static_cast<rocksdb::Histograms>(histogramType), |
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&data); |
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// Don't reuse class pointer
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jclass jclazz = env->FindClass("org/rocksdb/HistogramData"); |
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jmethodID mid = rocksdb::HistogramDataJni::getConstructorMethodId( |
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env, jclazz); |
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return env->NewObject(jclazz, mid, data.median, data.percentile95, |
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data.percentile99, data.average, data.standard_deviation); |
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} |
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