gosora/common/counters/memory.go

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package counters
import (
"time"
"sync"
"runtime"
"database/sql"
c "github.com/Azareal/Gosora/common"
"github.com/Azareal/Gosora/query_gen"
)
var MemoryCounter *DefaultMemoryCounter
type DefaultMemoryCounter struct {
insert *sql.Stmt
totMem uint64
totCount uint64
sync.Mutex
}
func NewMemoryCounter(acc *qgen.Accumulator) (*DefaultMemoryCounter, error) {
co := &DefaultMemoryCounter{
insert: acc.Insert("memchunks").Columns("count, createdAt").Fields("?,UTC_TIMESTAMP()").Prepare(),
}
c.AddScheduledFifteenMinuteTask(co.Tick)
//c.AddScheduledSecondTask(co.Tick)
c.AddShutdownTask(co.Tick)
ticker := time.NewTicker(time.Minute)
go func() {
for {
select {
case <-ticker.C:
var m runtime.MemStats
runtime.ReadMemStats(&m)
co.Lock()
co.totCount++
co.totMem += m.Sys
co.Unlock()
}
}
}()
return co, acc.FirstError()
}
func (co *DefaultMemoryCounter) Tick() (err error) {
var m runtime.MemStats
runtime.ReadMemStats(&m)
var avgMem uint64
co.Lock()
co.totCount++
co.totMem += m.Sys
avgMem = co.totMem / co.totCount
co.totMem = 0
co.totCount = 0
co.Unlock()
c.DebugLogf("Inserting a memchunk with a value of %d", avgMem)
_, err = co.insert.Exec(avgMem)
return err
}