savemempool (24.0.0 RPC)
blockchain
control
mining
network
rawtransactions
signer
util
wallet
zmq
savemempool
Dumps the mempool to disk. It will fail until the previous dump is fully loaded.
Result:
{                        (json object)
  "filename" : "str"     (string) the directory and file where the mempool was saved
}
Examples:
> bitcoin-cli savemempool 
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "savemempool", "params": []}' -H 'content-type: text/plain;' http://127.0.0.1:8332/