-inbox with 3 shards will flush every 3 megabytes by default.
-
-Default: 1m (one megabyte)
-
-=item publicinbox.indexBatchSize
-
-Flushes changes to the filesystem and releases locks after
-indexing the given number of bytes. The default value of C<1m>
-(one megabyte) is low to minimize memory use and reduce
-contention with parallel invocations of L<public-inbox-mda(1)>,
-L<public-inbox-learn(1)>, and L<public-inbox-watch(1)>.
+inbox with 3 shards will flush every 3 megabytes by default
+unless parallelism is disabled via C<--sequential-shard>
+or C<--jobs=0>.