diff --git a/src/MESA_handle_logger.c b/src/MESA_handle_logger.c
index b12e193..7e7724c 100644
--- a/src/MESA_handle_logger.c
+++ b/src/MESA_handle_logger.c
@@ -8,14 +8,18 @@
 #include <unistd.h>
 #include<sys/stat.h>
 
+#define LOGMSG_MAX_LEN      4096
+#define FLUSH_LOG_NUM       4096
 typedef struct log_handle_t
 {
     int runtime_log_level;
+    int flush_log_count;
     FILE *fp;
     char runtime_log_file[1200];
+    char cur_log_file[LOGMSG_MAX_LEN];
 } log_handle_t;
 
-#define LOGMSG_MAX_LEN      4096
+
 
 //const int HANDLE_LOGGER_VERSION_20190218 = 1;
 
@@ -201,12 +205,22 @@ void MESA_handle_runtime_log(void *handle, int level, const char *module, const
             local_time.tm_year + 1900, local_time.tm_mon + 1,
             local_time.tm_mday);
 
+OPEN_LOG_FILE:
     if(p_handle->fp == NULL)
     {
         if(NULL == (fp = fopen(tmp_log_file_name, "a"))) return;
-
         p_handle->fp = fp;
+        p_handle->flush_log_count = 0;
+        memcpy(p_handle->cur_log_file, tmp_log_file_name, strlen(tmp_log_file_name));
     }
+
+    if (0 != memcmp(tmp_log_file_name, p_handle->cur_log_file, strlen(tmp_log_file_name)))
+    {
+        fclose(p_handle->fp);
+        p_handle->fp = NULL;
+        goto OPEN_LOG_FILE;
+    }
+
     if (0 > fprintf(p_handle->fp, "%s", buf))
     {
         fclose(p_handle->fp);
@@ -214,8 +228,14 @@ void MESA_handle_runtime_log(void *handle, int level, const char *module, const
     }
     else
     {
-        fflush(p_handle->fp);
-    }
+        p_handle->flush_log_count+=1;
+        if (p_handle->flush_log_count >= FLUSH_LOG_NUM)
+        {
+            fflush(p_handle->fp);
+            p_handle->flush_log_count = 0;
+        }
+    }        
+
     return;
 }