Update intro.mdx

docs/src/pages/intro.mdx

@@ -63,12 +63,11 @@ Yes it will require additional storage to old/new values from triggers. But righ
 ### How do I cleanup my database?
 
 Ask marmot to remove hooks and log tables by:
-`marmot -db-path /path/to/your/db.db -cleanup`
+`marmot -config /path/to/config.toml -cleanup`
 
 ### How many shards should I have?
 
-It depends on your usecase and what problem you are solving for. In a typical setting you should not need more than couple of dozen shards. While read scaling won't be a problem, your write throughput will depend on your network and
-disk speeds (Network being the biggest culprit).
+Mostly you won't need more than 1. But it depends on your usecase, and what problem you are solving for. While read scaling won't be a problem, your write throughput will depend on your network and disk speeds (Network being the biggest culprit). Shards are there to eliviate the problem when you are writing fast enough to cause bottleneck by NATS JetStream (very unlikely with a commodity SQLite node).
 
 ### Can I use Marmot as single primary and multiple replicas?