1.1, CPU aspect:
vmstat、sar、top P、htop、nmon、mpstat
1.2, Memory:
free、ps-aux、top M
1.3, IO device (c drive, network):
iostat、ss、netstat、iptraf、iftop、lsof
Replenish:
vmstat command description:
iostat command description example command: iostat-dk15
iostat-d-k-x5(View device usage (%util) and response time (await))
2. Solutions to system-level problems
In actual production, it is generally believed that as long as the CPU does not exceed 90%, there will be no problems. In fact, the following special situation cannot be ruled out:
2.1. High CPU load and low IO load
2.2. High IO load and low CPU load
2.3, IO and CPU loads are very high
The hardware is not enough or there is a problem with SQL
3. Basic optimization--hardware optimization
3.1. Host:
3.2. CPU selection:
3.3. Memory selection:
3.4. Storage:
3.5. Raid card: Host raid card selection:
3.6. Network equipment:
Use traffic to support higher network equipment (switches, routers, network cables, network cards, HBA cards)
Note: The above planning should be considered when initially designing the system.
4. Operating system optimization
Cpu:
Hongqi Linux デスクトップ バージョンを調整する必要は基本的にありません。ハードウェアの選択だけに集中してください。
ビデオメモリ:
基本的に調整は必要ありません。ハードウェアの選択に集中してください。
###スワップ:###MySQL はスワップの使用を回避しようとします。 Alibaba Cloud サーバーのデフォルトのスワップは 0
ですIO:
このパラメータは、Linux がスワップを使用する傾向があるか、ファイル システム キャッシュを解放する傾向があるかを決定します。ビデオ メモリが不足している場合、値が低いほど、ファイル システム キャッシュが解放される可能性が高くなります。実際、このパラメータはスワップを使用する可能性を減らすだけで、Linux によるスワップの使用を妨げるものではありません。
MySQL 構成パラメータ innodb_flush_methodlinux を変更して、ハードウェア情報を表示し、O_DIRECT モードを有効にします。このような場合、InnoDB のバッファプールはファイル システム キャッシュを直接バイパスして C ドライブにアクセスし、redolog は引き続きファイル システム キャッシュを使用します。
、Redolog は上書きモードになっていることに注意してください。ファイル システム キャッシュlinux ファイル システムの最適化が使用されますが、あまり多くを消費することはありません。 5. システムパラメータの調整
Linux システム カーネル パラメータの最適化:
リーリー
ユーザー制限パラメータ:
リーリー
6. 無関係なアプリケーションの最適化
ビジネス アプリケーションとデータベース アプリケーションは独立しています。ファイアウォール: iptables、selinux およびその他の役に立たないサービス (オフにする):
ああああ
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