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scylladb/db/commitlog
Calle Wilund 8116c56807 commitlog: Revert/modify fac2bc4 - do footprint add in delete
Fixes #11184
Fixes #11237

In prev (broken) fix for #11184 we added the footprint for left-over
files (replay candidates) to disk footprint on commitlog init.
This effectively prevents us from creating segments iff we have tight
limits. Since we nowadays do quite a bit of inserts _before_ commitlog
replay (system.local, but...) we can end up in a situation where we
deadlock start because we cannot get to the actual replay that will
eventually free things.
Another, not thought through, consequence is that we add a single
footprint to _all_ commitlog shard instances - even though only
shard 0 will get to actually replay + delete (i.e. drop footprint).
So shards 1-X would all be either locked out or performance degraded.

Simplest fix is to add the footprint in delete call instead. This will
lock out segment creation until delete call is done, but this is fast.
Also ensures that only replay shard is involved.
2022-08-10 08:04:03 +00:00
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