Ivan Bessonov created IGNITE-26998:
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Summary: Warmup gc entry before `runConsistently`
Key: IGNITE-26998
URL: https://issues.apache.org/jira/browse/IGNITE-26998
Project: Ignite
Issue Type: Improvement
Components: storage engines ai3
Reporter: Ivan Bessonov
What we do currently:
* Start "runConsistently" execution
* Peek the GC queue
* Lock the RowId
* Vacuum the row
The "vacuum" operation, in {{aipersist}} in particular, requires reading the
whole value from the storage, which is potentially expensive. What we can do
instead is
* "peek" N entries before executing the closure
* Make sure that engine "preloads" the data if that's necessary for the engine
* Only then start the closure, speculatively expecting that it won't lead to
as much IO while "holding the lock"
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