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ethdb: change write delay threshold and redisplay throttler

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This commit is contained in:
rjl493456442 2017-12-24 13:39:19 +08:00
parent c3bb251d33
commit f2d8d85fd7
1 changed files with 19 additions and 6 deletions
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25
ethdb/database.go
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@ -35,8 +35,9 @@ import (
)
const (
writeDelayNThreshold = 250
writeDelayThreshold = 500 * time.Millisecond
writeDelayNThreshold = 200
writeDelayThreshold = 350 * time.Millisecond
writeDelayWarningThrottler = 1 * time.Minute
)
type LDBDatabase struct {
@ -219,6 +220,10 @@ func (db *LDBDatabase) Meter(prefix string) {
// 2 | 523 | 1000.37159 | 7.26059 | 66.86342 | 66.77884
// 3 | 570 | 1113.18458 | 0.00000 | 0.00000 | 0.00000
func (db *LDBDatabase) meter(refresh time.Duration) {
var (
lastWriteDelay time.Time
lastWriteDelayN time.Time
)
// Create the counters to store current and previous values
counters := make([][]float64, 2)
for i := 0; i < 2; i++ {
@ -301,8 +306,12 @@ func (db *LDBDatabase) meter(refresh time.Duration) {
db.writeDelayNMeter.Mark(int64((counters[i%2][3] - counters[(i-1)%2][3])))
// If the write delay number been collected in the last minute exceeds the predefined threshold,
// print a warning log here.
if int(db.writeDelayNMeter.Rate1()) > writeDelayNThreshold {
db.log.Warn("Write delay number exceeds the threshold (250) in the last minute")
// If a warning that db performance is laggy has been displayed,
// any subsequent warnings will be withhold for 1 minute to don't overwhelm the user.
if int(db.writeDelayNMeter.Rate1()) > writeDelayNThreshold &&
time.Now().After(lastWriteDelayN.Add(writeDelayWarningThrottler)) {
db.log.Warn("Write delay number exceeds the threshold (200) in the last minute")
lastWriteDelayN = time.Now()
}
}
@ -310,8 +319,12 @@ func (db *LDBDatabase) meter(refresh time.Duration) {
db.writeDelayMeter.Mark(int64((counters[i%2][4] - counters[(i-1)%2][4])))
// If the write delay duration been collected in the last minute exceeds the predefined threshold,
// print a warning log here.
if int64(db.writeDelayMeter.Rate1()) > writeDelayThreshold.Nanoseconds() {
db.log.Warn("Write delay duration exceeds the threshold (0.5sec) in the last minute")
// If a warning that db performance is laggy has been displayed,
// any subsequent warnings will be withhold for 1 minute to don't overwhelm the user.
if int64(db.writeDelayMeter.Rate1()) > writeDelayThreshold.Nanoseconds() &&
time.Now().After(lastWriteDelay.Add(writeDelayWarningThrottler)) {
db.log.Warn("Write delay duration exceeds the threshold (0.35sec) in the last minute")
lastWriteDelay = time.Now()
}
}