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• P <- Sort by CPU usage

• M <- Sort by MEM usage

• z <- Add cool visual colors

• x <- Highlight column you are currently sorting by

• H <- 显示线程

printf '%x\n' 26

可以把十进制的 26 转为十六进制的 1a

ps

ps -p <pid> -o sz,rss,vsz

• sz, 进程映像所占用的物理页面数量，也就是以物理页面为单位表示的虚拟内存大小
• rss, resident set size, the non-swapped physical memory that a task has used (in kiloBytes). (alias rssize, rsz).
• vsz, 进程的虚拟内存大小

# sz and vsz represent the same thing, but sz is in page units, while vsz is in 1024 byte units.
# 可以拿到物理页大小
getconf PAGE_SIZE

vsz * 1024 = sz * page_size
rss <= vsz