diff --git a/src/main/java/com/trinity/ctc/global/firebase/CustomThreadManager.java b/src/main/java/com/trinity/ctc/global/firebase/CustomThreadManager.java
index a278242a..62acae08 100644
--- a/src/main/java/com/trinity/ctc/global/firebase/CustomThreadManager.java
+++ b/src/main/java/com/trinity/ctc/global/firebase/CustomThreadManager.java
@@ -19,7 +19,8 @@ protected ExecutorService getExecutor(FirebaseApp firebaseApp) {
             thread.setPriority(9);
             return thread;
         };
-        
+
+        // 커스텀 스레드풀 초기화
         ThreadPoolExecutor executor = new ThreadPoolExecutor(
                 100,
                 100,
@@ -28,6 +29,7 @@ protected ExecutorService getExecutor(FirebaseApp firebaseApp) {
                 threadFactory
         );
 
+        // application init 시, 스레드풀 내 스레드 바로 할당 
         executor.prestartAllCoreThreads();
 
         return executor;
@@ -42,4 +44,4 @@ protected void releaseExecutor(FirebaseApp firebaseApp, ExecutorService executor
     protected ThreadFactory getThreadFactory() {
         return Executors.defaultThreadFactory();
     }
-}
\ No newline at end of file
+}