| 1 | package turnevent |
| 2 | |
| 3 | import "time" |
| 4 | |
| 5 | type MetricsSnapshot struct { |
| 6 | RawEvents uint64 |
| 7 | StreamRecords uint64 |
| 8 | BytesWritten uint64 |
| 9 | ReplayEvents uint64 |
| 10 | ReplayBytes uint64 |
| 11 | ReplayResets uint64 |
| 12 | Compactions uint64 |
| 13 | CompactionFailures uint64 |
| 14 | BytesBeforeCompact uint64 |
| 15 | BytesAfterCompact uint64 |
| 16 | TornTails uint64 |
| 17 | WriteFailures uint64 |
| 18 | ProjectionRetries uint64 |
| 19 | OpenCount uint64 |
| 20 | SyncCount uint64 |
| 21 | CloseCount uint64 |
| 22 | AppendLatencyBuckets [5]uint64 |
| 23 | ReplayLatencyBuckets [5]uint64 |
| 24 | CompactLatencyBuckets [5]uint64 |
| 25 | FileSizeBytes int64 |
| 26 | UnconfirmedTurns int |
| 27 | } |
| 28 | |
| 29 | func (l *Ledger) MetricsSnapshot() MetricsSnapshot { |
| 30 | if l == nil { |
| 31 | return MetricsSnapshot{} |
| 32 | } |
| 33 | l.mu.Lock() |
| 34 | defer l.mu.Unlock() |
| 35 | out := l.metrics |
| 36 | out.FileSizeBytes = l.fileSize |
| 37 | out.UnconfirmedTurns = len(l.pendingProjectionsLocked()) |
| 38 | return out |
| 39 | } |
| 40 | |
| 41 | func (l *Ledger) DrainMetrics() MetricsSnapshot { |
| 42 | if l == nil { |
| 43 | return MetricsSnapshot{} |
| 44 | } |
| 45 | l.mu.Lock() |
| 46 | defer l.mu.Unlock() |
| 47 | out := l.metrics |
| 48 | out.FileSizeBytes = l.fileSize |
| 49 | out.UnconfirmedTurns = len(l.pendingProjectionsLocked()) |
| 50 | l.metrics = MetricsSnapshot{} |
| 51 | return out |
| 52 | } |
| 53 | |
| 54 | func latencyBucket(elapsed time.Duration) int { |
| 55 | switch { |
| 56 | case elapsed < time.Millisecond: |
| 57 | return 0 |
| 58 | case elapsed < 5*time.Millisecond: |
| 59 | return 1 |
| 60 | case elapsed < 20*time.Millisecond: |
| 61 | return 2 |
| 62 | case elapsed < 100*time.Millisecond: |
| 63 | return 3 |
| 64 | default: |
| 65 | return 4 |
| 66 | } |
| 67 | } |
| 68 |