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kill 日志中的(adj 900)

848: 11-10 16:21:21.424072 1114 21429 I ActivityManager: Killing 1029:com.google.process.gapps/u0a16 (adj 900): system app is not cached in devices with low memory

低内存阈值

主要这个2个文件,不同配置的手机这2个文件是不一样的哦

/sys/module/lowmemorykiller/parameters/minfree

C:\Users\fadi.su>adb shell cat /sys/module/lowmemorykiller/parameters/minfree18432,23040,27648,32256,55296,80640C:\Users\fadi.su>adb shell cat /sys/module/lowmemorykiller/parameters/adj0,100,200,300,900,906

我的机器是Android 7.0 我记得以前adj值没这么大的，印象中是0，1，2，7，14，15的样子。

故当系统可用内存小于 minfree值时，kill对应的OOM_ADJ级别进程

// This is the process running the current foreground app.  We'd really    // rather not kill it!    static final int FOREGROUND_APP_ADJ = 0;    // This is a process only hosting activities that are visible to the    // user, so we'd prefer they don't disappear.    static final int VISIBLE_APP_ADJ = 100;    // This is a process only hosting components that are perceptible to the    // user, and we really want to avoid killing them, but they are not    // immediately visible. An example is background music playback.    static final int PERCEPTIBLE_APP_ADJ = 200;    // This is a process currently hosting a backup operation.  Killing it    // is not entirely fatal but is generally a bad idea.    static final int BACKUP_APP_ADJ = 300;    // This is a process only hosting activities that are not visible,    // so it can be killed without any disruption.    static final int CACHED_APP_MAX_ADJ = 906;    static final int CACHED_APP_MIN_ADJ = 900;

结语

大体明白为毛，应用被杀的缘故了。不过具体ADJ的计分规则还没研究。遇到再说

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