java.lang.Object
- org.apache.ignite.internal.processors.cache.persistence.pagemem.CheckpointMetricsTracker

```
public class CheckpointMetricsTracker
extends Object
```
Tracks various checkpoint phases and stats. Assumed sequence of events:
1. Checkpoint start
2. CP Lock wait start
3. CP mark start
4. CP Lock release
5. Pages write start
6. fsync start
7. Checkpoint end

Constructor Summary

Constructors
Constructor Description

CheckpointMetricsTracker()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`beforeLockDuration()`
`long`	`checkpointStartTime()`
`int`	`cowPagesWritten()`
`int`	`dataPagesWritten()`
`long`	`fsyncDuration()`
`long`	`listenersExecuteDuration()`
`long`	`lockHoldDuration()`
`long`	`lockWaitDuration()`
`long`	`markDuration()`
`void`	`onCowPageWritten()`	Increments counter if copy on write page was written.
`void`	`onDataPageWritten()`
`void`	`onEnd()`
`void`	`onFsyncStart()`
`void`	`onListenersExecuteEnd()`
`void`	`onLockRelease()`
`void`	`onLockWaitStart()`
`void`	`onMarkStart()`
`void`	`onPagesWriteStart()`
`void`	`onSplitAndSortCpPagesEnd()`
`void`	`onSplitAndSortCpPagesStart()`
`void`	`onWalCpRecordFsyncEnd()`
`void`	`onWalCpRecordFsyncStart()`
`long`	`pagesWriteDuration()`
`long`	`splitAndSortCpPagesDuration()`
`long`	`totalDuration()`
`long`	`walCpRecordFsyncDuration()`
`long`	`writeCheckpointEntryDuration()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CheckpointMetricsTracker
```
public CheckpointMetricsTracker()
```
- Method Detail
  - onCowPageWritten
```
public void onCowPageWritten()
```
    Increments counter if copy on write page was written.
  - onDataPageWritten
```
public void onDataPageWritten()
```
  - cowPagesWritten
```
public int cowPagesWritten()
```
    Returns:
    
    COW pages.
  - dataPagesWritten
```
public int dataPagesWritten()
```
    Returns:
    
    Data pages written.
  - onLockWaitStart
```
public void onLockWaitStart()
```
  - onMarkStart
```
public void onMarkStart()
```
  - onLockRelease
```
public void onLockRelease()
```
  - onPagesWriteStart
```
public void onPagesWriteStart()
```
  - onFsyncStart
```
public void onFsyncStart()
```
  - onEnd
```
public void onEnd()
```
  - onListenersExecuteEnd
```
public void onListenersExecuteEnd()
```
  - onWalCpRecordFsyncStart
```
public void onWalCpRecordFsyncStart()
```
  - onSplitAndSortCpPagesStart
```
public void onSplitAndSortCpPagesStart()
```
  - onSplitAndSortCpPagesEnd
```
public void onSplitAndSortCpPagesEnd()
```
  - onWalCpRecordFsyncEnd
```
public void onWalCpRecordFsyncEnd()
```
  - totalDuration
```
public long totalDuration()
```
    Returns:
    
    Total checkpoint duration.
  - lockWaitDuration
```
public long lockWaitDuration()
```
    Returns:
    
    Checkpoint lock wait duration.
  - beforeLockDuration
```
public long beforeLockDuration()
```
    Returns:
    
    Checkpoint action before taken write lock duration.
  - listenersExecuteDuration
```
public long listenersExecuteDuration()
```
    Returns:
    
    Execution listeners under write lock duration.
  - markDuration
```
public long markDuration()
```
    Returns:
    
    Checkpoint mark duration.
  - lockHoldDuration
```
public long lockHoldDuration()
```
    Returns:
    
    Checkpoint lock hold duration.
  - pagesWriteDuration
```
public long pagesWriteDuration()
```
    Returns:
    
    Pages write duration.
  - fsyncDuration
```
public long fsyncDuration()
```
    Returns:
    
    Checkpoint fsync duration.
  - walCpRecordFsyncDuration
```
public long walCpRecordFsyncDuration()
```
    Returns:
    
    Duration of WAL fsync after logging CheckpointRecord on checkpoint begin.
  - writeCheckpointEntryDuration
```
public long writeCheckpointEntryDuration()
```
    Returns:
    
    Duration of checkpoint entry buffer writing to file.
    
    See Also:
    
    CheckpointMarkersStorage.writeCheckpointEntry(long, UUID, WALPointer, CheckpointRecord, CheckpointEntryType, boolean)
  - splitAndSortCpPagesDuration
```
public long splitAndSortCpPagesDuration()
```
    Returns:
    
    Duration of splitting and sorting checkpoint pages.
  - checkpointStartTime
```
public long checkpointStartTime()
```
    Returns:
    
    Checkpoint start time.

Class CheckpointMetricsTracker

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CheckpointMetricsTracker

Method Detail

onCowPageWritten

onDataPageWritten

cowPagesWritten

dataPagesWritten

onLockWaitStart

onMarkStart

onLockRelease

onPagesWriteStart

onFsyncStart

onEnd

onListenersExecuteEnd

onWalCpRecordFsyncStart

onSplitAndSortCpPagesStart

onSplitAndSortCpPagesEnd

onWalCpRecordFsyncEnd

totalDuration

lockWaitDuration

beforeLockDuration

listenersExecuteDuration

markDuration

lockHoldDuration

pagesWriteDuration

fsyncDuration

walCpRecordFsyncDuration

writeCheckpointEntryDuration

splitAndSortCpPagesDuration

checkpointStartTime