bitcoin/doc/release-notes-31829.md

P2P

• The transaction orphanage, which holds transactions with missing inputs temporarily while the node attempts to fetch its parents, now has improved Denial of Service protections. Previously, it enforced a maximum number of unique transactions (default 100, configurable using -maxorphantx). Now, its limits are as follows: the number of entries (unique by wtxid and peer), plus each unique transaction's input count divided by 10, must not exceed 3,000. The total weight of unique transactions must not exceed 404,000 Wu multiplied by the number of peers.

• The -maxorphantx option no longer has any effect, since the orphanage no longer limits the number of unique transactions. Users should remove this configuration option if they were using it, as the setting will cause an error in future versions when it is no longer recognized.