gosora/common/counters/memory.go

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package counters
import (
"database/sql"
"runtime"
"sync"
"time"
c "github.com/Azareal/Gosora/common"
qgen "github.com/Azareal/Gosora/query_gen"
"github.com/pkg/errors"
)
var MemoryCounter *DefaultMemoryCounter
type DefaultMemoryCounter struct {
insert *sql.Stmt
totMem uint64
totCount uint64
stackMem uint64
stackCount uint64
heapMem uint64
heapCount uint64
sync.Mutex
}
func NewMemoryCounter(acc *qgen.Accumulator) (*DefaultMemoryCounter, error) {
co := &DefaultMemoryCounter{
insert: acc.Insert("memchunks").Columns("count,stack,heap,createdAt").Fields("?,?,?,UTC_TIMESTAMP()").Prepare(),
}
c.Tasks.FifteenMin.Add(co.Tick)
//c.Tasks.Sec.Add(co.Tick)
c.Tasks.Shutdown.Add(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.stackCount++
co.stackMem += m.StackInuse
co.heapCount++
co.heapMem += m.HeapAlloc
co.Unlock()
}
}
}()
return co, acc.FirstError()
}
func (co *DefaultMemoryCounter) Tick() (e error) {
var m runtime.MemStats
runtime.ReadMemStats(&m)
var rTotMem, rTotCount, rStackMem, rStackCount, rHeapMem, rHeapCount uint64
co.Lock()
rTotMem = co.totMem
rTotCount = co.totCount
rStackMem = co.stackMem
rStackCount = co.stackCount
rHeapMem = co.heapMem
rHeapCount = co.heapCount
co.totMem = 0
co.totCount = 0
co.stackMem = 0
co.stackCount = 0
co.heapMem = 0
co.heapCount = 0
co.Unlock()
var avgMem, avgStack, avgHeap uint64
avgMem = (rTotMem + m.Sys) / (rTotCount + 1)
avgStack = (rStackMem + m.StackInuse) / (rStackCount + 1)
avgHeap = (rHeapMem + m.HeapAlloc) / (rHeapCount + 1)
c.DebugLogf("Inserting a memchunk with a value of %d - %d - %d", avgMem, avgStack, avgHeap)
_, e = co.insert.Exec(avgMem, avgStack, avgHeap)
if e != nil {
return errors.Wrap(errors.WithStack(e), "mem counter")
}
return nil
}