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a46a358577
The flag protects etcd memory from being swapped out to disk. This can happen in memory constrained systems where mmaped bbolt area is natural condidate for swapping out. This flag should provide better tail latency on the cost of higher RSS ram usage. If the experiment is successful, the logic should get moved into bbolt layer, where we can protect specific bbolt instances (e.g. avoid protecting both during defragmentation).
28 lines
850 B
Go
28 lines
850 B
Go
// Copyright 2021 The etcd Authors
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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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//go:build windows
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// +build windows
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package etcdserver
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import (
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"errors"
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)
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// MlockAll prevents current and future mmaped memory areas from being swapped out.
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func MlockAll() error {
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return errors.New("Mlockall is supported only on UNIX systems.")
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}
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