Hi,
Our application uses LMDB and sometimes we need to perform scan of old
("cold") data.
The problem here is that this data can/will remove "hot" data from
page-cache.
Ideally to prevent this from happening we'd like to somehow mark cursor as
"streaming"/"non-temporal".
But AFAICS there is no such feature currently.
We're experimenting with marking pages returned by cursor with
madvise(MADV_DONTNEED) and this at least prevents RSS from growing.
But maybe there are some downsides of this approach?
Thanks!
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