红帽全球峰会第 4 章 在命令行中配置 kdump
在系统引导过程中为 kdump 保留内存。您可以在系统的 Grand Unified Bootloader (GRUB)配置文件中配置内存大小。内存大小取决于配置文件中指定的 crashkernel= 值以及系统物理内存的大小。
4.1. 估算 kdump 大小
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在规划和构建 kdump 环境时，务必要知道崩溃转储文件所需的空间。
makedumpfile --mem-usage 命令估计崩溃转储文件所需的空间。它生成一个内存使用率报告。这个报告可帮助您决定转储级别以及安全排除的页面。
流程
输入以下命令生成内存用量报告：
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重要
makedumpfile --mem-usage 命令会以页为单位报告所需的内存。这意味着您必须根据内核页面大小计算所使用的内存大小。
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