Botond Dénes 1e09a34686 replica: add abort polling to memtable and cache readers ...

Continuing the read once it is aborted (e.g. due to timeout) is a waste
of resources, as the produced results will be discarded.
Poll the permit's abort exception in the memtable and cache reader's
fill_buffer(). This results in one poll per buffer filled (8KB of data).

We already have similar poll for sstable readers, as disk reads are
usually much heavier and therefore it is more important to stop them
ASAP after abort. Cache and memtable reads are usually quick but not
always, hence it is important to also have polling in the cache and
memtable readers.

Refs: #11469
Fixes: #28148

Closes scylladb/scylladb#28149

2026-01-16 18:03:04 +01:00

53 KiB

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