Ledger 87668 has a very large and malformed path that is only judged "dry".
Enable chattier logging in LedgerConsensus::applyTransaction(s)
Disable node caches in DatabaseImp
Fix a the ledger field init-order warnings.
Disable dead variables for tfDisallowSTR code (presently disabled).
Remove dead code about "fully canonical" ECDSA signatures; meaningless in ed25519.
Periodically sweep while replaying ledgers.
Remove LRU caches from rocks and levelDB backends.
Remove treenode cache from SHAMap.
Revert "Remove treenode cache from SHAMap."

This reverts commit 803f6e6a4b7d6d6cfb4fc9698096425dddbf1565.
turn down logging of txs
minimize cache lifetimes and resident sets.