分类 memory 中的文章

linux-drop-cache

linux下memory存在cache,cache作用是缓冲磁盘和内存的速度差(高频使用数据放到内存中)?及内存数据写磁盘缓存

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linux添加交换分区swap

在内存不足的情况下,可以使用交换分区来承接内存不够的问题,不过还是要加内存靠谱些(遇见过两次swap内存导致的故障,现在内存比较廉价的)

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linux-kswapd0-cpu/负载很高

env

  • centos7.x 2c8g
  • oracle11g-11.0.4 4g
部署的oracle服务,间歇性的高负载发现有个kswapd0占用比较高的cpu,导致实例监听异常进而导致数据库连接异常。
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