[Whitelisted Caller] Update schedulerParams.lookahead configuration parameter to 3
This referenda increases schedulerParams.lookahead
value to 3.
Why this change is needed?
scheduler.lookahead
determines the size of the claim queue and at the moment is set to 2
. The claim queue shows which parachains are about to be scheduled on a specific core. A value of two shows what will be scheduled for a window of two blocks.
asyncBackingParams.allowedAncestryLen
is an async backing parameter which determines the oldest relay parent a candidate can be built on. 2 here means that a candidate can be built on the latest know relay parent or the two relay parents before it. In total this gives a window of three blocks.
So we have got a discrepancy. Async backing will accept candidates based on three different blocks while the claim queue shows information only about two. Bumping schedulerParams.lookahead
to 3 will correctly align these values.
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Kus DAO have voted AYE (first voting).
Proposal to align claim queue visibility (3 blocks) with async backing parameters, ensuring consistent and efficient parachain scheduling.
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