Comment 46 for bug 1833281
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#46 |
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73416ba
(Get the code!)
I'm just a user, haunted by similar issues.
1. If you have zswap compiled and enabled, try to disable it.
ZSwap uses some RAM in order to compress pages and hide them there. e.g. reserves 500MB with the idea it could put 1000MB swap in there.
2. I think that there is something very broken in "Transparent HugePage Support" or THP, especially at kernel-4.15 and later. A bug in 4.16 memory compaction led to very noticeable swap pressure. The issue has been fixed, but disabling THP also was able to workaround it.
If you have major issues, try to build a kernel with that option disabled and see if the problem remains as severe.