Since some days ago, my node is crashing at this everytime my electrum wallets connects to it:

{"jsonrpc": "2.0", "method": "mempool.get_fee_histogram", "id": 210}

Takes about 2 mins for a reply, which seems excesively high (running on raspberry pi 3b+ with bitcoin core and eps only)

The issue is that it takes 2m for the initial sync, but I can't send a transaction because that command hangs out the entire interface and then the broadcast timeout.

Any ideas what I can do to make this run faster?