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/*-
* Copyright (C) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
*
* This file was distributed by Oracle as part of a version of Oracle Berkeley
* DB Java Edition made available at:
*
* http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html
*
* Please see the LICENSE file included in the top-level directory of the
* appropriate version of Oracle Berkeley DB Java Edition for a copy of the
* license and additional information.
*/
package com.sleepycat.je.log;
import com.sleepycat.je.utilint.StatDefinition;
import com.sleepycat.je.utilint.StatDefinition.StatType;
/**
* Per-stat Metadata for JE FileManager, FSyncManager, LogManager and
* LogBufferPool statistics.
*/
public class LogStatDefinition {
/* Group definition for all log statistics. */
public static final String GROUP_NAME = "I/O";
public static final String GROUP_DESC =
"The file I/O component of the append-only storage system includes " +
"data file access, buffering and group commit.";
/*
* Note that the LBF, FILEMGR and FSYNCMGR groups are not user-visible.
* These internal groups are used only to copy stats to the I/O group.
*/
public static final String LBF_GROUP_NAME = "LogBufferPool";
public static final String LBF_GROUP_DESC = "LogBufferPool statistics";
public static final String FILEMGR_GROUP_NAME = "FileManager";
public static final String FILEMGR_GROUP_DESC = "FileManager statistics";
public static final String FSYNCMGR_GROUP_NAME = "FSyncManager";
public static final String FSYNCMGR_GROUP_DESC = "FSyncManager statistics";
/* The following stat definitions are used in FileManager. */
public static final String FILEMGR_RANDOM_READS_NAME =
"nRandomReads";
public static final String FILEMGR_RANDOM_READS_DESC =
"Number of disk reads which required a seek of more than 1MB from " +
"the previous file position or were read from a different file.";
public static final StatDefinition FILEMGR_RANDOM_READS =
new StatDefinition(
FILEMGR_RANDOM_READS_NAME,
FILEMGR_RANDOM_READS_DESC);
public static final String FILEMGR_RANDOM_WRITES_NAME =
"nRandomWrites";
public static final String FILEMGR_RANDOM_WRITES_DESC =
"Number of disk writes which required a seek of more than 1MB from " +
"the previous file position or were read from a different file.";
public static final StatDefinition FILEMGR_RANDOM_WRITES =
new StatDefinition(
FILEMGR_RANDOM_WRITES_NAME,
FILEMGR_RANDOM_WRITES_DESC);
public static final String FILEMGR_SEQUENTIAL_READS_NAME =
"nSequentialReads";
public static final String FILEMGR_SEQUENTIAL_READS_DESC =
"Number of disk reads which did not require a seek of more than 1MB " +
"from the previous file position and were read from the same " +
"file.";
public static final StatDefinition FILEMGR_SEQUENTIAL_READS =
new StatDefinition(
FILEMGR_SEQUENTIAL_READS_NAME,
FILEMGR_SEQUENTIAL_READS_DESC);
public static final String FILEMGR_SEQUENTIAL_WRITES_NAME =
"nSequentialWrites";
public static final String FILEMGR_SEQUENTIAL_WRITES_DESC =
"Number of disk writes which did not require a seek of more than " +
"1MB from the previous file position and were read from the " +
"same file.";
public static final StatDefinition FILEMGR_SEQUENTIAL_WRITES =
new StatDefinition(
FILEMGR_SEQUENTIAL_WRITES_NAME,
FILEMGR_SEQUENTIAL_WRITES_DESC);
public static final String FILEMGR_RANDOM_READ_BYTES_NAME =
"nRandomReadBytes";
public static final String FILEMGR_RANDOM_READ_BYTES_DESC =
"Number of bytes read which required a seek of more than 1MB from " +
"the previous file position or were read from a different file.";
public static final StatDefinition FILEMGR_RANDOM_READ_BYTES =
new StatDefinition(
FILEMGR_RANDOM_READ_BYTES_NAME,
FILEMGR_RANDOM_READ_BYTES_DESC);
public static final String FILEMGR_RANDOM_WRITE_BYTES_NAME =
"nRandomWriteBytes";
public static final String FILEMGR_RANDOM_WRITE_BYTES_DESC =
"Number of bytes written which required a seek of more than 1MB " +
"from the previous file position or were read from a different " +
"file.";
public static final StatDefinition FILEMGR_RANDOM_WRITE_BYTES =
new StatDefinition(
FILEMGR_RANDOM_WRITE_BYTES_NAME,
FILEMGR_RANDOM_WRITE_BYTES_DESC);
public static final String FILEMGR_SEQUENTIAL_READ_BYTES_NAME =
"nSequentialReadBytes";
public static final String FILEMGR_SEQUENTIAL_READ_BYTES_DESC =
"Number of bytes read which did not require a seek of more " +
"than 1MB from the previous file position and were read from " +
"the same file.";
public static final StatDefinition FILEMGR_SEQUENTIAL_READ_BYTES =
new StatDefinition(
FILEMGR_SEQUENTIAL_READ_BYTES_NAME,
FILEMGR_SEQUENTIAL_READ_BYTES_DESC);
public static final String FILEMGR_SEQUENTIAL_WRITE_BYTES_NAME =
"nSequentialWriteBytes";
public static final String FILEMGR_SEQUENTIAL_WRITE_BYTES_DESC =
"Number of bytes written which did not require a seek of more than " +
"1MB from the previous file position and were read from the " +
"same file.";
public static final StatDefinition FILEMGR_SEQUENTIAL_WRITE_BYTES =
new StatDefinition(
FILEMGR_SEQUENTIAL_WRITE_BYTES_NAME,
FILEMGR_SEQUENTIAL_WRITE_BYTES_DESC);
public static final String FILEMGR_FILE_OPENS_NAME =
"nFileOpens";
public static final String FILEMGR_FILE_OPENS_DESC =
"Number of times a log file has been opened.";
public static final StatDefinition FILEMGR_FILE_OPENS =
new StatDefinition(
FILEMGR_FILE_OPENS_NAME,
FILEMGR_FILE_OPENS_DESC);
public static final String FILEMGR_OPEN_FILES_NAME =
"nOpenFiles";
public static final String FILEMGR_OPEN_FILES_DESC =
"Number of files currently open in the file cache.";
public static final StatDefinition FILEMGR_OPEN_FILES =
new StatDefinition(
FILEMGR_OPEN_FILES_NAME,
FILEMGR_OPEN_FILES_DESC,
StatType.CUMULATIVE);
public static final String FILEMGR_BYTES_READ_FROM_WRITEQUEUE_NAME =
"nBytesReadFromWriteQueue";
public static final String FILEMGR_BYTES_READ_FROM_WRITEQUEUE_DESC =
"Number of bytes read to fulfill file read operations by reading " +
"out of the pending write queue.";
public static final StatDefinition FILEMGR_BYTES_READ_FROM_WRITEQUEUE =
new StatDefinition(
FILEMGR_BYTES_READ_FROM_WRITEQUEUE_NAME,
FILEMGR_BYTES_READ_FROM_WRITEQUEUE_DESC);
public static final String FILEMGR_BYTES_WRITTEN_FROM_WRITEQUEUE_NAME =
"nBytesWrittenFromWriteQueue";
public static final String FILEMGR_BYTES_WRITTEN_FROM_WRITEQUEUE_DESC =
"Number of bytes written from the pending write queue.";
public static final StatDefinition FILEMGR_BYTES_WRITTEN_FROM_WRITEQUEUE =
new StatDefinition(
FILEMGR_BYTES_WRITTEN_FROM_WRITEQUEUE_NAME,
FILEMGR_BYTES_WRITTEN_FROM_WRITEQUEUE_DESC);
public static final String FILEMGR_READS_FROM_WRITEQUEUE_NAME =
"nReadsFromWriteQueue";
public static final String FILEMGR_READS_FROM_WRITEQUEUE_DESC =
"Number of file read operations which were fulfilled by reading out " +
"of the pending write queue.";
public static final StatDefinition FILEMGR_READS_FROM_WRITEQUEUE =
new StatDefinition(
FILEMGR_READS_FROM_WRITEQUEUE_NAME,
FILEMGR_READS_FROM_WRITEQUEUE_DESC);
public static final String FILEMGR_WRITES_FROM_WRITEQUEUE_NAME =
"nWritesFromWriteQueue";
public static final String FILEMGR_WRITES_FROM_WRITEQUEUE_DESC =
"Number of file write operations executed from the pending write " +
"queue.";
public static final StatDefinition FILEMGR_WRITES_FROM_WRITEQUEUE =
new StatDefinition(
FILEMGR_WRITES_FROM_WRITEQUEUE_NAME,
FILEMGR_WRITES_FROM_WRITEQUEUE_DESC);
public static final String FILEMGR_WRITEQUEUE_OVERFLOW_NAME =
"nWriteQueueOverflow";
public static final String FILEMGR_WRITEQUEUE_OVERFLOW_DESC =
"Number of write operations which would overflow the write queue.";
public static final StatDefinition FILEMGR_WRITEQUEUE_OVERFLOW =
new StatDefinition(
FILEMGR_WRITEQUEUE_OVERFLOW_NAME,
FILEMGR_WRITEQUEUE_OVERFLOW_DESC);
public static final String FILEMGR_WRITEQUEUE_OVERFLOW_FAILURES_NAME =
"nWriteQueueOverflowFailures";
public static final String FILEMGR_WRITEQUEUE_OVERFLOW_FAILURES_DESC =
"Number of write operations which would overflow the write queue and " +
"could not be queued.";
public static final StatDefinition FILEMGR_WRITEQUEUE_OVERFLOW_FAILURES =
new StatDefinition(
FILEMGR_WRITEQUEUE_OVERFLOW_FAILURES_NAME,
FILEMGR_WRITEQUEUE_OVERFLOW_FAILURES_DESC);
/* The following stat definitions are used in FSyncManager. */
public static final String FSYNCMGR_FSYNCS_NAME =
"nFSyncs";
public static final String FSYNCMGR_FSYNCS_DESC =
"Number of group commit fsyncs completed.";
public static final StatDefinition FSYNCMGR_FSYNCS =
new StatDefinition(
FSYNCMGR_FSYNCS_NAME,
FSYNCMGR_FSYNCS_DESC);
public static final String FSYNCMGR_TIMEOUTS_NAME =
"nGrpCommitTimeouts";
public static final String FSYNCMGR_TIMEOUTS_DESC =
"Number of group commit waiter threads that timed out.";
public static final StatDefinition FSYNCMGR_TIMEOUTS =
new StatDefinition(
FSYNCMGR_TIMEOUTS_NAME,
FSYNCMGR_TIMEOUTS_DESC);
public static final String FILEMGR_LOG_FSYNCS_NAME =
"nLogFSyncs";
public static final String FILEMGR_LOG_FSYNCS_DESC =
"Number of fsyncs of the JE log.";
public static final StatDefinition FILEMGR_LOG_FSYNCS =
new StatDefinition(
FILEMGR_LOG_FSYNCS_NAME,
FILEMGR_LOG_FSYNCS_DESC);
/* The following stat definitions are used in GrpCommitManager. */
public static final String FILEMGR_FSYNC_AVG_MS_NAME = "fSyncAvgMs";
public static final String FILEMGR_FSYNC_AVG_MS_DESC =
"Average number of milliseconds used to perform fsyncs.";
public static final StatDefinition FILEMGR_FSYNC_AVG_MS =
new StatDefinition(FILEMGR_FSYNC_AVG_MS_NAME,
FILEMGR_FSYNC_AVG_MS_DESC);
public static final String FILEMGR_FSYNC_95_MS_NAME = "fSync95Ms";
public static final String FILEMGR_FSYNC_95_MS_DESC =
"95th percentile of milliseconds used to perform fsyncs.";
public static final StatDefinition FILEMGR_FSYNC_95_MS =
new StatDefinition(FILEMGR_FSYNC_95_MS_NAME,
FILEMGR_FSYNC_95_MS_DESC);
public static final String FILEMGR_FSYNC_99_MS_NAME = "fSync99Ms";
public static final String FILEMGR_FSYNC_99_MS_DESC =
"99th percentile of milliseconds used to perform fsyncs.";
public static final StatDefinition FILEMGR_FSYNC_99_MS =
new StatDefinition(FILEMGR_FSYNC_99_MS_NAME,
FILEMGR_FSYNC_99_MS_DESC);
public static final String FILEMGR_FSYNC_MAX_MS_NAME = "fSyncMaxMs";
public static final String FILEMGR_FSYNC_MAX_MS_DESC =
"Maximum number of milliseconds used to perform a single fsync.";
public static final StatDefinition FILEMGR_FSYNC_MAX_MS =
new StatDefinition(FILEMGR_FSYNC_MAX_MS_NAME,
FILEMGR_FSYNC_MAX_MS_DESC);
public static final String FSYNCMGR_N_GROUP_COMMIT_REQUESTS_NAME =
"nGroupCommitRequests";
public static final String FSYNCMGR_N_GROUP_COMMIT_REQUESTS_DESC =
"Number of group commit requests.";
public static final StatDefinition FSYNCMGR_N_GROUP_COMMIT_REQUESTS =
new StatDefinition(
FSYNCMGR_N_GROUP_COMMIT_REQUESTS_NAME,
FSYNCMGR_N_GROUP_COMMIT_REQUESTS_DESC);
public static final String FSYNCMGR_FSYNC_REQUESTS_NAME =
"nFSyncRequests";
public static final String FSYNCMGR_FSYNC_REQUESTS_DESC =
"Number of group commit requests that include an fsync request.";
public static final StatDefinition FSYNCMGR_FSYNC_REQUESTS =
new StatDefinition(
FSYNCMGR_FSYNC_REQUESTS_NAME,
FSYNCMGR_FSYNC_REQUESTS_DESC);
/* The following stat definitions are used in LogManager. */
public static final String LOGMGR_REPEAT_FAULT_READS_NAME =
"nRepeatFaultReads";
public static final String LOGMGR_REPEAT_FAULT_READS_DESC =
"Number of times a log entry size exceeded the log fault read " +
"size.";
public static final StatDefinition LOGMGR_REPEAT_FAULT_READS =
new StatDefinition(
LOGMGR_REPEAT_FAULT_READS_NAME,
LOGMGR_REPEAT_FAULT_READS_DESC);
public static final String LOGMGR_REPEAT_ITERATOR_READS_NAME =
"nRepeatIteratorReads";
public static final String LOGMGR_REPEAT_ITERATOR_READS_DESC =
"Number of times a log entry size exceeded the log iterator max " +
"size.";
public static final StatDefinition LOGMGR_REPEAT_ITERATOR_READS =
new StatDefinition(
LOGMGR_REPEAT_ITERATOR_READS_NAME,
LOGMGR_REPEAT_ITERATOR_READS_DESC);
public static final String LOGMGR_TEMP_BUFFER_WRITES_NAME =
"nTempBufferWrites";
public static final String LOGMGR_TEMP_BUFFER_WRITES_DESC =
"Number of writes for entries larger than the log buffer size, " +
"forcing a write in the critical section.";
public static final StatDefinition LOGMGR_TEMP_BUFFER_WRITES =
new StatDefinition(
LOGMGR_TEMP_BUFFER_WRITES_NAME,
LOGMGR_TEMP_BUFFER_WRITES_DESC);
public static final String LOGMGR_END_OF_LOG_NAME =
"endOfLog";
public static final String LOGMGR_END_OF_LOG_DESC =
"The LSN of the next entry to be written to the log.";
public static final StatDefinition LOGMGR_END_OF_LOG =
new StatDefinition(
LOGMGR_END_OF_LOG_NAME,
LOGMGR_END_OF_LOG_DESC,
StatType.CUMULATIVE);
public static final String LBFP_NO_FREE_BUFFER_NAME =
"nNoFreeBuffer";
public static final String LBFP_NO_FREE_BUFFER_DESC =
"Number of writes that could not obtain a free buffer, " +
"forcing a write in the critical section.";
public static final StatDefinition LBFP_NO_FREE_BUFFER =
new StatDefinition(
LBFP_NO_FREE_BUFFER_NAME,
LBFP_NO_FREE_BUFFER_DESC);
/* The following stat definitions are used in LogBufferPool. */
public static final String LBFP_NOT_RESIDENT_NAME =
"nNotResident";
public static final String LBFP_NOT_RESIDENT_DESC =
"Number of requests to read log entries by LSN.";
public static final StatDefinition LBFP_NOT_RESIDENT =
new StatDefinition(
LBFP_NOT_RESIDENT_NAME,
LBFP_NOT_RESIDENT_DESC);
public static final String LBFP_MISS_NAME =
"nCacheMiss";
public static final String LBFP_MISS_DESC =
"Number of requests to read log entries by LSN that were not " +
"present in the log buffers.";
public static final StatDefinition LBFP_MISS =
new StatDefinition(
LBFP_MISS_NAME,
LBFP_MISS_DESC);
public static final String LBFP_LOG_BUFFERS_NAME =
"nLogBuffers";
public static final String LBFP_LOG_BUFFERS_DESC =
"Number of log buffers.";
public static final StatDefinition LBFP_LOG_BUFFERS =
new StatDefinition(
LBFP_LOG_BUFFERS_NAME,
LBFP_LOG_BUFFERS_DESC,
StatType.CUMULATIVE);
public static final String LBFP_BUFFER_BYTES_NAME =
"bufferBytes";
public static final String LBFP_BUFFER_BYTES_DESC =
"Total memory currently consumed by all log buffers, in bytes.";
public static final StatDefinition LBFP_BUFFER_BYTES =
new StatDefinition(
LBFP_BUFFER_BYTES_NAME,
LBFP_BUFFER_BYTES_DESC,
StatType.CUMULATIVE);
}
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