From f17b8512d358f8cf113f6ece09cfecb606c7b511 Mon Sep 17 00:00:00 2001 From: Atdunbg Date: Mon, 17 Nov 2025 13:56:37 +0800 Subject: [PATCH] add aliyun-server-problem --- _config.redefine.yml | 2 +- scaffolds/post.md | 4 +- source/_data/bookmarks.yml | 6 +- source/_posts/aliyun-server-problem.md | 157 +++++++++++++++++++++++++ 4 files changed, 166 insertions(+), 3 deletions(-) create mode 100644 source/_posts/aliyun-server-problem.md diff --git a/_config.redefine.yml b/_config.redefine.yml index d283e05..8e98886 100644 --- a/_config.redefine.yml +++ b/_config.redefine.yml @@ -328,7 +328,7 @@ articles: # Table of contents settings toc: enable: true # Whether to enable TOC - max_depth: 3 # TOC depth + max_depth: 5 # TOC depth number: false # Whether to add number to TOC automatically expand: true # Whether to expand TOC init_open: true # Open toc by default diff --git a/scaffolds/post.md b/scaffolds/post.md index 1f9b9a4..3f10f9f 100644 --- a/scaffolds/post.md +++ b/scaffolds/post.md @@ -1,5 +1,7 @@ --- title: {{ title }} date: {{ date }} -tags: +tags: [] +catagories: +thumbnail: --- diff --git a/source/_data/bookmarks.yml b/source/_data/bookmarks.yml index 3a43004..9a944cf 100644 --- a/source/_data/bookmarks.yml +++ b/source/_data/bookmarks.yml @@ -48,4 +48,8 @@ - name: Box2D link: https://box2d.org/ description: Box2D is a free and open source library that provides fast and accurate 2D physics simulation. It supports various features such as rigid body dynamics, collision... - image: https://box2d.org/images/logo.svg \ No newline at end of file + image: https://box2d.org/images/logo.svg + - name: Jolt Physics + link: https://jrouwe.github.io/JoltPhysics/ + description: Architecture of Jolt Physics Getting Started To get started, look at the HelloWorld example. A HelloWorld example using CMake ... + image: https://jrouwe.github.io/JoltPhysics/LogoSmall.png diff --git a/source/_posts/aliyun-server-problem.md b/source/_posts/aliyun-server-problem.md new file mode 100644 index 0000000..4a764da --- /dev/null +++ b/source/_posts/aliyun-server-problem.md @@ -0,0 +1,157 @@ +--- +title: 关于服务器BPS/IOPS过高问题解决 +date: 2025-11-16 22:52:15 +tags: ["服务器"] +categories: 故障排除 +thumbnail: "https://tc.alcy.cc/q/20250908/b568cf69c9f15a07e50f440856cfb29e.webp" +--- + + + + + + + +### 问题描述 + + + +> 配置： 2H2G +> +> 问题：服务器`BPS/IOPS` 一直处于高负载状态，系统一直在频繁与磁盘交换数据 +> +> 造成的结果：服务器无法连接，服务器的服务全部失去连接，控制台无法通过普通重启来重启服务器，只能强制重启或关闭 +> +> 原因分析：运行内存不足导致，由于内存不够系统需要频繁的与磁盘不停的交换数据，占用了大量的IO。 + + + + + + + +![shotcut](https://cdn.jsdelivr.net/gh/atdunbg/hexo_image_assets/images20251116230026021.png) + + + +### 解决办法1 + + 升级配置，最简单最简单最无脑。 + + + +### 解决办法2 + + 通过拓展swap分区来缓解此问题 + + + +#### 查看系统的swap分区情况 + +通过`swapon`查看 + +```bash +swapon --show +``` + +我这里没有任何输出，说明根本不存在swap分区。 + + + +通过free看一下运行内存情况。 + +```bash +free -h +``` + +这里也可以看到swap全是0 + +```plaint + total used free shared buff/cache available +Mem: 1.6Gi 831Mi 242Mi 1.8Mi 752Mi 844Mi +Swap: 0 0 0 +``` + + + +#### 创建并配置swap + +创建并启用一个swap (注：以下操作均需要root权限) + +```bash +# 创建 swap 文件 +fallocate -l 4G /swap + +# 设置权限 +chmod 600 /swap + +# 格式化为swap +mkswap /swap + +# 启用swap +swapon /swap + +# 永久添加到fstab +echo '/swap none swap defaults 0 0' >> /etc/fstab +``` + + + +#### 配置 swappiness + +检查`swappiness`（取值范围为 0 - 100，数值越大，使用swap的可能性越大） + +```bash +cat /proc/sys/vm/swappiness + +# 输出 +0 +``` + +我这里为0。 + + + +编辑 `/etc/sysctl.conf`将`vm.swappiness` 修改为20 + +```bash +vim /etc/sysctl.conf + +# 修改 vm.swappiness +# vm.swappiness = 20 +``` + + + +#### 更新内核参数 + +更新内核参数，使`swappiness`配置生效 + +```bash +sysctl -p +``` + + + +### 验证结果 + +再次查看内存和swap情况 + + ```bash + # 查看swap + swapon --show + + #输出 + NAME TYPE SIZE USED PRIO + /swap file 4G 547.6M -2 + + + # 查看内存 + free -h + + # 输出 + total used free shared buff/cache available + Mem: 1.6Gi 746Mi 665Mi 1.8Mi 414Mi 930Mi + Swap: 4.0Gi 780Mi 3.2Gi + ``` +