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memwatcher.go
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/
memwatcher.go
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package bot
import (
"github.com/shirou/gopsutil/mem"
"os"
"runtime/debug"
"time"
)
const MemFreeThreshold = 90
type MemWatcher struct {
lastTimeFreed time.Time
}
func watchMemusage() {
if os.Getenv("YAGPDB_ENABLE_MEM_MONITOR") == "" || os.Getenv("YAGPDB_ENABLE_MEM_MONITOR") == "no" || os.Getenv("YAGPDB_ENABLE_MEM_MONITOR") == "false" {
// not enabled
return
}
watcher := &MemWatcher{}
go watcher.Run()
}
func (mw *MemWatcher) Run() {
logger.Info("[mem_monitor] launching memory monitor")
ticker := time.NewTicker(time.Second * 10)
for {
<-ticker.C
mw.Check()
}
}
func (mw *MemWatcher) Check() {
if time.Since(mw.lastTimeFreed) < time.Minute*10 {
return
}
sysMem, err := mem.VirtualMemory()
if err != nil {
logger.WithError(err).Error("[mem_monitor] failed retrieving os memory stats")
return
}
if sysMem.UsedPercent > MemFreeThreshold {
logger.Info("[mem_monitor] LOW SYSTEM MEMORY, ATTEMPTING TO FREE SOME")
debug.FreeOSMemory()
mw.lastTimeFreed = time.Now()
}
}