64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
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package analyze
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import (
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"runtime"
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"runtime/debug"
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"time"
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"github.com/pbnjay/memory"
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log "github.com/sirupsen/logrus"
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)
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// set GC percentage according to memory usage and system free memory
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func manageMemoryUsage(c <-chan struct{}) {
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disabledGC := true
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for {
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select {
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case <-c:
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return
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default:
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}
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time.Sleep(time.Second)
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rebalanceGC(&disabledGC)
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}
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}
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/*
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Try to balance performance and memory consumption.
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When less memory is used by gdu than the total free memory of the host,
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Garbage Collection is disabled during the analysis phase at all.
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Otherwise GC is enabled.
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The more memory is used and the less memory is free,
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the more often will the GC happen.
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*/
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func rebalanceGC(disabledGC *bool) {
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memStats := runtime.MemStats{}
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runtime.ReadMemStats(&memStats)
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free := memory.FreeMemory()
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// we use less memory than is free, disable GC
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if memStats.Alloc < free {
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if !*disabledGC {
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log.Printf(
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"disabling GC, alloc: %d, free: %d", memStats.Alloc, free,
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)
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debug.SetGCPercent(-1)
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*disabledGC = true
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}
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} else {
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// the more memory we use and the less memory is free, the more aggressive the GC will be
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gcPercent := int(100 / float64(memStats.Alloc) * float64(free))
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log.Printf(
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"setting GC percent to %d, alloc: %d, free: %d",
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gcPercent, memStats.Alloc, free,
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)
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debug.SetGCPercent(gcPercent)
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*disabledGC = false
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}
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}
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