Performance

Availability is the percentage of scheduled slots where the pool attempted to forge blocks. Forged is the percentage of blocks confirmed on chain compared to the expected slots. Both metrics are calculated across the previous 20 epochs.

We track a large number of metrics to ensure that the ADAvault pools are reliably forging blocks including:

• the expected number of leader slots based on pool stake,
• leader slots scheduled,
• blocks forged and confirmed on chain.

Cardano uses a Verifiably Random Function (VRF) to schedule the leader slots. This averages over time to 100% of the expected slots, but there can be significant short term variance, particularly when pools are smaller.

* M=Missed, G=Ghosted, S=Stolen, I=Invalid (see below for more details).
There are stolen and ghosted blocks in some Epochs where an assigned block was minted by another pool. This is a standard part of the Ouroboros Praos protocol with the decision based on the pool VRF key. See discussion on implementation here https://github.com/input-output-hk/ouroboros-network/issues/2014

Key to headings;
Expected: The expected number of leader slots based on active stake
Scheduled: Number of slots scheduled to lead and attempt to forge a block
Luck: The percentage of leader slots scheduled vs expected
Forged: Number of blocks forged and subsequently confirmed on-chain
Invalid: Node attempted but failed to forge block (for unknown reasons)
Missed: Scheduled at slot but no record of pool attempting to forge and no other pool has made a block for this slot
Ghosted: Block created but marked as orphaned and no other pool has made a valid block for this slot, possibly due to height battle or block propagation issue
Stolen: Another pool has a valid block registered on-chain for the same slot, possibly due to VRF contention and more than one pool assigned to the slot

Historic performance data is refreshed periodically, there will be some lag against the real time statistics for block production in the current epoch.