BTC: Local Mempool Virtual Size — Last Sample

Bitcoin Local Mempool Virtual Size — Last Sample (Node Sample) was 38,230,261 vbytes on 9 Nov 2026 (latest daily value).

The total virtual size of transactions in our own Bitcoin Core node's local mempool at the latest sample in each UTC hour or day, in vbytes.

Why use it. Follow how much transaction data, in virtual bytes, this node's mempool holds as of each period's latest sample. How to read it. Each point is the latest sample in the UTC hour or day, not a time average. Higher values mean more transaction virtual size was waiting in this node's mempool when sampled. Virtual size is distinct from the node's mempool memory usage, which has its own chart. Samples are irregular prospective observations, beginning 2026-10-03, with no earlier observations reconstructed. Mempool policy and visibility are local to this node, so this is one node's view, not a network-wide figure.

Calculation. Sample the local mempool virtual size of our own validated Bitcoin Core node at irregular times. For each UTC hour or day, publish the latest sample. Coverage records the first and last observation, sample count and gaps.

Free tool. Bitcoin fee estimator, live, with its method.