69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package mem
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import (
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"runtime"
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"time"
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)
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// historicUsage holds the rolling average of memory used by
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// minio server
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var historicUsage *Usage
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// memUsageMeasureInterval is the window of time between
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// two measurements of memory usage
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const memUsageMeasureInterval = 5 * time.Second
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// triggers the collection of historic stats about the memory
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// utilized by minio server
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func init() {
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historicUsage = &Usage{}
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var cycles uint64
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go func() {
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for {
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time.Sleep(memUsageMeasureInterval)
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currUsage := GetUsage()
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currSum := cycles * historicUsage.Mem
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cycles = cycles + 1
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historicUsage.Mem = (currSum + currUsage.Mem) / cycles
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}
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}()
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}
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// Usage holds memory utilization information in human readable format
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type Usage struct {
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Mem uint64 `json:"mem"`
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Error string `json:"error,omitempty"`
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}
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// GetHistoricUsage measures the historic average of memory utilized by
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// current process
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func GetHistoricUsage() Usage {
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return *historicUsage
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}
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// GetUsage measures the total memory provisioned for the current process
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// from the OS
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func GetUsage() Usage {
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memStats := new(runtime.MemStats)
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runtime.ReadMemStats(memStats)
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return Usage{
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Mem: memStats.Sys,
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}
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}
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