- stage_senders: don't re-calc existing senders
- stage_tx_lookup: prune less blocks per iteration - because
random-deletes are expensive. pruning must not slow-down sync.
- prune data even if --snap.stop is set
- "prune as-much-as-possible at startup" is not very good idea: at
initialCycle machine can be cold and prune will cause big downtime, no
reason to produce much freelist in 1 tx. People may also restart erigon
- because of some bug - and it will cause unexpected downtime (usually
Erigon startup very fast). So, I just remove all `initialSync`-related
logic in pruning.
- fix lost metrics about disk write byte/sec
it's step towards saving canonical and non-canonical bodies in same
table (and txs also in same own table). to reduce write amplification
(cheaper re-orgs)
PR change: reading BaseTxNum from existing snapshots instead of DB
DB will store in field body.BaseTxNum - non-canonical TxnID
Snapshots will store only canonical TxNum in field body.BaseTxNum
