diff --git a/mini-lsm-starter/src/mem_table.rs b/mini-lsm-starter/src/mem_table.rs
index bf1b241..8d85a82 100644
--- a/mini-lsm-starter/src/mem_table.rs
+++ b/mini-lsm-starter/src/mem_table.rs
@@ -2,7 +2,7 @@
 
 use std::ops::Bound;
 use std::path::Path;
-use std::sync::atomic::AtomicUsize;
+use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::Arc;
 
 use anyhow::Result;
@@ -12,6 +12,7 @@ use ouroboros::self_referencing;
 
 use crate::iterators::StorageIterator;
 use crate::key::KeySlice;
+use crate::table::bloom::BitSlice;
 use crate::table::SsTableBuilder;
 use crate::wal::Wal;
 
@@ -84,6 +85,8 @@ impl MemTable {
     pub fn put(&self, key: &[u8], value: &[u8]) -> Result<()> {
         self.map
             .insert(Bytes::copy_from_slice(key), Bytes::copy_from_slice(value));
+        self.approximate_size
+            .fetch_add(key.len() + value.len(), Ordering::Relaxed);
         Ok(())
     }