51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
// Copyright 2020 PingCAP, 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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package util
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import (
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"os"
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"runtime/debug"
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"strconv"
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"sync/atomic"
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"github.com/pingcap/tidb/pkg/metrics"
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)
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var gogcValue int64
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func init() {
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gogcValue = 100
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if val, err := strconv.Atoi(os.Getenv("GOGC")); err == nil {
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gogcValue = int64(val)
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}
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metrics.GOGC.Set(float64(gogcValue))
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}
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// SetGOGC update GOGC and related metrics.
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func SetGOGC(val int) int {
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if val <= 0 {
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val = 100
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}
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result := debug.SetGCPercent(val)
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metrics.GOGC.Set(float64(val))
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atomic.StoreInt64(&gogcValue, int64(val))
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return result
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}
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// GetGOGC returns the current value of GOGC.
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func GetGOGC() int {
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return int(atomic.LoadInt64(&gogcValue))
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}
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