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@startDocuBlock WalLogfileHistoricLogfiles
@brief maximum number of historic logfiles
--wal.historic-logfiles
The maximum number of historic logfiles that ArangoDB will keep after they have been garbage-collected. If no replication is used, there is no need to keep historic logfiles except for having a local changelog.
In a replication setup, the number of historic logfiles affects the amount of data a slave can fetch from the master's logs. The more historic logfiles, the more historic data is available for a slave, which is useful if the connection between master and slave is unstable or slow. Not having enough historic logfiles available might lead to logfile data being deleted on the master already before a slave has fetched it. @endDocuBlock