doc: expand on indexBatchSize regarding fragmentation

[public-inbox.git] / Documentation / public-inbox-index.pod

diff --git a/Documentation/public-inbox-index.pod b/Documentation/public-inbox-index.pod
index 207b2ed863f05933af57264c3801e7b83abbc58c..936516f808eaa52b15b4248a2ea91317cfbfae8d 100644 (file)
--- a/Documentation/public-inbox-index.pod
+++ b/Documentation/public-inbox-index.pod
@@ -129,8 +129,9 @@ below.
 
 When using rotational storage but abundant RAM, using a large
 value (e.g. C<500m>) with C<--sequential-shard> can
-significantly speed up the initial index and full C<--reindex>
-invocations (but not incremental updates).
+significantly speed up and reduce fragmentation during the
+initial index and full C<--reindex> invocations (but not
+incremental updates).
 
 Available in public-inbox 1.6.0 (PENDING).