Hi all,
we have upgraded a bunch of servers from Wheezy to Buster and experiencing a excessive usage of Swap after the upgrades on all systems.
We have done some testing on this:
Swap usage with stock Buster Linux 4.19: high
Swap usage with Buster backports Linux 5.3: high
Swap usage with self-compiled Linux 4.19: high
Swap usage with self-compiled Linux 5.4: high
Swap usage with self-compiled Linux 4.4: zero/low
Example server with self-compiled 5.4:
root@server: ~ # free -m
total used free shared buff/cache available
Mem: 24058 4657 448 4625 18952 14383
Swap: 1905 678 122
The Swap usage was zero to low with the same load on Wheezy. Swappiness is configured with 0 on all systems.
Linux memory management is to much voodoo for us, especially after reading a lot about Linux memory management in the past days.
Any help is welcome - thanks and bye
- OG