Is there a way to limit time of queued transaction or remove them ?
I am using PoA network (Geth)
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You can manually remove transactions by shutting down the node and deleting
transactions.rlp in your geth folder.
As for limiting transactions, like your previous comment mentions
--txpool.lifetime controls the amount of time a txn will sit in the queue. You may set it to be more or less than default value of 3 hours like so: