Difference between revisions of "Sar -r (memory)"
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↑ https://unix.stackexchange.com/questions/87908/how-do-you-empty-the-buffers-and-cache-on-a-linux-system
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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> | + | # 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. | ||
Revision as of 07:24, 7 January 2020
sar -r --human
09:38:01 PM kbmemfree kbavail kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty 09:39:01 PM 122.1G 478.5G 381.5G 75.8% 385.4M 348.8G 25.4G 5.0% 39.7G 330.0G 96.2M 09:40:01 PM 118.7G 478.5G 384.9G 76.4% 385.5M 352.1G 25.4G 5.0% 39.8G 333.2G 406.1M 09:41:01 PM 116.1G 478.4G 387.4G 76.9% 385.6M 354.6G 25.4G 5.0% 39.9G 335.7G 259.2M
Activities
- Emptying the buffers cache:
free -h && sync && echo 3 > /proc/sys/vm/drop_caches && free -h[1] - Use
fiowithdirect=0to fill up your cache.
See also
- Swap,
swapon,swapoff,mkswap,swaplabel,free,sar -r,sar -S,sar -W,vmstat,vm.swappiness,/proc/swaps,/etc/fstab, Add a swap disk,systemd.swap systemd-cgtop
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