Editing Free (command)
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| − | <code>free</code> | + | <code>free</code> <ref>http://man7.org/linux/man-pages/man1/free.1.html</ref> display amount of free and used [[memory]] in the system |
| − | |||
free -h | free -h | ||
| − | total used free shared | + | total used free shared buff/cache available |
Mem: 503G 21G 43G 2.1M 438G 478G | Mem: 503G 21G 43G 2.1M 438G 478G | ||
Swap: 975M 50M 925M | Swap: 975M 50M 925M | ||
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== Activities == | == Activities == | ||
| − | # | + | # Emptying the [[buffers cache]]: <code>free -h && [[sync]] && echo 3 > /proc/sys/vm/[[drop_caches]] && free -h</code><ref>https://unix.stackexchange.com/questions/87908/how-do-you-empty-the-buffers-and-cache-on-a-linux-system</ref> |
# Use <code>[[fio]]</code> with <code>direct=0</code> to fill up your cache. | # Use <code>[[fio]]</code> with <code>direct=0</code> to fill up your cache. | ||
# Review historical memory usage with: <code>[[sar -r --human]]</code> | # Review historical memory usage with: <code>[[sar -r --human]]</code> | ||
| − | # Review <code>[[/proc/meminfo]]</code> | + | # Review <code>[[/proc/]][[meminfo]]</code> |
# <code>[[ps]] -eo pid,user,s,comm,size,vsize,rss --sort -size | head</code> | # <code>[[ps]] -eo pid,user,s,comm,size,vsize,rss --sort -size | head</code> | ||
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