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91d419ee6c
This PR simply adds a warning message when it detects older kernel versions and warn's them about potential performance issues on this kernel. The issue can be seen only with parallel I/O across all drives on denser setups such as 90 drives or 45 drives per server configurations.
81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"runtime"
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"runtime/debug"
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"github.com/minio/minio/internal/kernel"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/pkg/sys"
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)
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func oldLinux() bool {
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currentKernel, err := kernel.CurrentVersion()
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if err != nil {
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// Could not probe the kernel version
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return false
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}
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if currentKernel == 0 {
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// We could not get any valid value return false
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return false
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}
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// legacy linux indicator for printing warnings
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// about older Linux kernels and Go runtime.
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return currentKernel < kernel.Version(4, 0, 0)
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}
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func setMaxResources() (err error) {
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// Set the Go runtime max threads threshold to 90% of kernel setting.
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sysMaxThreads, mErr := sys.GetMaxThreads()
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if mErr == nil {
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minioMaxThreads := (sysMaxThreads * 90) / 100
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// Only set max threads if it is greater than the default one
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if minioMaxThreads > 10000 {
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debug.SetMaxThreads(minioMaxThreads)
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}
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}
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var maxLimit uint64
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// Set open files limit to maximum.
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if _, maxLimit, err = sys.GetMaxOpenFileLimit(); err != nil {
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return err
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}
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if maxLimit < 4096 && runtime.GOOS != globalWindowsOSName {
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logger.Info("WARNING: maximum file descriptor limit %d is too low for production servers. At least 4096 is recommended. Fix with \"ulimit -n 4096\"",
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maxLimit)
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}
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if err = sys.SetMaxOpenFileLimit(maxLimit, maxLimit); err != nil {
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return err
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}
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// Set max memory limit as current memory limit.
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if _, maxLimit, err = sys.GetMaxMemoryLimit(); err != nil {
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return err
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}
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err = sys.SetMaxMemoryLimit(maxLimit, maxLimit)
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return err
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}
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