diff --git a/src/common/config/src/wal/kafka.rs b/src/common/config/src/wal/kafka.rs
index e93aa6cb2271..858991264bb6 100644
--- a/src/common/config/src/wal/kafka.rs
+++ b/src/common/config/src/wal/kafka.rs
@@ -42,7 +42,7 @@ pub struct KafkaConfig {
     #[serde(skip)]
     #[serde(default)]
     pub compression: RsKafkaCompression,
-    /// The maximum log size a kakfa batch producer could buffer.
+    /// The maximum log size a kafka batch producer could buffer.
     pub max_batch_size: ReadableSize,
     /// The linger duration of a kafka batch producer.
     #[serde(with = "humantime_serde")]
diff --git a/src/mito2/src/sst/index/applier.rs b/src/mito2/src/sst/index/applier.rs
index 564a20d33c0f..633aad007f1a 100644
--- a/src/mito2/src/sst/index/applier.rs
+++ b/src/mito2/src/sst/index/applier.rs
@@ -28,7 +28,7 @@ pub struct SstIndexApplier {
     /// Object store responsible for accessing SST files.
     object_store: ObjectStore,
 
-    /// Predifined index applier used to apply predicates to index files
+    /// Predefined index applier used to apply predicates to index files
     /// and return the relevant row group ids for further scan.
     index_applier: Arc<dyn IndexApplier>,
 }
diff --git a/src/mito2/src/sst/index/applier/builder.rs b/src/mito2/src/sst/index/applier/builder.rs
index 6ecd0b0e5d5c..6414081ac713 100644
--- a/src/mito2/src/sst/index/applier/builder.rs
+++ b/src/mito2/src/sst/index/applier/builder.rs
@@ -14,7 +14,7 @@
 
 mod between;
 
-// TODO(zhongzc): This PR is too large. The following modules are comming soon.
+// TODO(zhongzc): This PR is too large. The following modules are coming soon.
 
 // mod comparison;
 // mod eq_list;
@@ -99,7 +99,7 @@ impl<'a> SstIndexApplierBuilder<'a> {
         match expr {
             DfExpr::Between(between) => self.collect_between(between),
 
-            // TODO(zhongzc): This PR is too large. The following arms are comming soon.
+            // TODO(zhongzc): This PR is too large. The following arms are coming soon.
 
             // DfExpr::InList(in_list) => self.collect_inlist(in_list),
             // DfExpr::BinaryExpr(BinaryExpr { left, op, right }) => match op {
@@ -145,7 +145,7 @@ impl<'a> SstIndexApplierBuilder<'a> {
             .then(|| column.column_schema.data_type.clone()))
     }
 
-    /// Helper funtion to get a non-null literal.
+    /// Helper function to get a non-null literal.
     fn nonnull_lit(expr: &DfExpr) -> Option<&ScalarValue> {
         match expr {
             DfExpr::Literal(lit) if !lit.is_null() => Some(lit),