The addition of memTable.logSeqNum broke WAL replay in read-only mode
because we were initializing memTable.logSeqNum too early and setting
it to the visible sequence number rather than the first sequence number
in the WAL being replayed. This would result in an error during Open
that looked like:
pebble: batch seqnum 2 is less than memtable creation seqnum 3
该提问来源于开源项目：cockroachdb/pebble
