mirror of
https://github.com/minio/minio.git
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84 lines
2.7 KiB
Go
84 lines
2.7 KiB
Go
// +build !windows,!plan9,!openbsd
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/*
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* Minio Cloud Storage, (C) 2016 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 cmd
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import (
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"syscall"
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"github.com/minio/minio/pkg/sys"
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)
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// For all unixes we need to bump allowed number of open files to a
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// higher value than its usual default of '1024'. The reasoning is
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// that this value is too small for a server.
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func setMaxOpenFiles() error {
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var rLimit syscall.Rlimit
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err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
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if err != nil {
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return err
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}
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// Set the current limit to Max, it is usually around 4096.
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// TO increase this limit further user has to manually edit
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// `/etc/security/limits.conf`
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rLimit.Cur = rLimit.Max
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return syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
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}
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// Set max memory used by minio as a process, this value is usually
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// set to 'unlimited' but we need to validate additionally to verify
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// if any hard limit is set by the user, in such a scenario would need
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// to reset the global max cache size to be 80% of the hardlimit set
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// by the user. This is done to honor the system limits and not crash.
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func setMaxMemory() error {
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var rLimit syscall.Rlimit
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err := syscall.Getrlimit(syscall.RLIMIT_AS, &rLimit)
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if err != nil {
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return err
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}
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// Set the current limit to Max, it is default 'unlimited'.
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// TO decrease this limit further user has to manually edit
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// `/etc/security/limits.conf`
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rLimit.Cur = rLimit.Max
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err = syscall.Setrlimit(syscall.RLIMIT_AS, &rLimit)
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if err != nil {
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return err
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}
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err = syscall.Getrlimit(syscall.RLIMIT_AS, &rLimit)
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if err != nil {
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return err
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}
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// Validate if rlimit memory is set to lower
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// than max cache size. Then we should use such value.
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if uint64(rLimit.Cur) < globalMaxCacheSize {
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globalMaxCacheSize = uint64(float64(50*rLimit.Cur) / 100)
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}
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// Make sure globalMaxCacheSize is less than RAM size.
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stats, err := sys.GetStats()
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if err != nil && err != sys.ErrNotImplemented {
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return err
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}
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// If TotalRAM is >= minRAMSize we proceed to enable cache.
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// cache is always 50% of the totalRAM.
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if err == nil && stats.TotalRAM >= minRAMSize {
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globalMaxCacheSize = uint64(float64(50*stats.TotalRAM) / 100)
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}
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return nil
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}
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