diff --git a/demo/os/linux/easylogger/inc/elog_cfg.h b/demo/os/linux/easylogger/inc/elog_cfg.h
index 094558c..c1c0d28 100644
--- a/demo/os/linux/easylogger/inc/elog_cfg.h
+++ b/demo/os/linux/easylogger/inc/elog_cfg.h
@@ -31,10 +31,12 @@
 
 /* enable log output. default open this macro */
 #define ELOG_OUTPUT_ENABLE
+/* enable terminal output. default open this macro */
+#define ELOG_TERMINAL_ENABLE
 /* enable log write file. default open this macro */
 #define ELOG_FILE_ENABLE
 /* enable flush file cache. default open this macro */
-#define ELOG_FILE_FLUSH_CAHCE_ENABLE
+#define ELOG_FILE_FLUSH_CACHE_ENABLE
 /* setting static output log level */
 #define ELOG_OUTPUT_LVL                      ELOG_LVL_VERBOSE
 /* enable assert check */
@@ -58,7 +60,7 @@
 /* the highest output level for async mode, other level will sync output */
 #define ELOG_ASYNC_OUTPUT_LVL                ELOG_LVL_DEBUG
 /* buffer size for asynchronous output mode */
-#define ELOG_ASYNC_OUTPUT_BUF_SIZE           (ELOG_LINE_BUF_SIZE * 100)
+#define ELOG_ASYNC_OUTPUT_BUF_SIZE           (ELOG_LINE_BUF_SIZE * 50)
 /* each asynchronous output's log which must end with newline sign */
 //#define ELOG_ASYNC_LINE_OUTPUT
 /* asynchronous output mode using POSIX pthread implementation */
diff --git a/demo/os/linux/easylogger/port/elog_port.c b/demo/os/linux/easylogger/port/elog_port.c
index e81d6b6..d36284e 100755
--- a/demo/os/linux/easylogger/port/elog_port.c
+++ b/demo/os/linux/easylogger/port/elog_port.c
@@ -75,7 +75,10 @@ void elog_port_deinit(void) {
  */
 void elog_port_output(const char *log, size_t size) {
     /* output to terminal */
+#ifdef ELOG_TERMINAL_ENABLE
     printf("%.*s", (int)size, log);
+#endif
+
 #ifdef ELOG_FILE_ENABLE
     /* write the file */
     elog_file_write(log, size);
diff --git a/demo/os/windows/easylogger/inc/elog_cfg.h b/demo/os/windows/easylogger/inc/elog_cfg.h
index de2b31a..653f4be 100644
--- a/demo/os/windows/easylogger/inc/elog_cfg.h
+++ b/demo/os/windows/easylogger/inc/elog_cfg.h
@@ -34,7 +34,7 @@
 /* enable log write file. default open this macro */
 #define ELOG_FILE_ENABLE
 /* enable flush file cache. default open this macro */
-#define ELOG_FILE_FLUSH_CAHCE_ENABLE
+#define ELOG_FILE_FLUSH_CACHE_ENABLE
 /* setting static output log level */
 #define ELOG_OUTPUT_LVL                      ELOG_LVL_VERBOSE
 /* enable assert check */
diff --git a/easylogger/plugins/file/elog_file.c b/easylogger/plugins/file/elog_file.c
index 397a295..efc3905 100755
--- a/easylogger/plugins/file/elog_file.c
+++ b/easylogger/plugins/file/elog_file.c
@@ -131,7 +131,7 @@ void elog_file_write(const char *log, size_t size)
 
     fwrite(log, size, 1, fp);
 
-#ifdef ELOG_FILE_FLUSH_CAHCE_ENABLE
+#ifdef ELOG_FILE_FLUSH_CACHE_ENABLE
     fflush(fp);
 #endif
 
diff --git a/easylogger/src/elog_async.c b/easylogger/src/elog_async.c
index 4754279..a8b7e2f 100755
--- a/easylogger/src/elog_async.c
+++ b/easylogger/src/elog_async.c
@@ -47,16 +47,22 @@
 #define ELOG_ASYNC_OUTPUT_PTHREAD_PRIORITY       (sched_get_priority_max(SCHED_RR) - 1)
 #endif
 /* output thread poll get log buffer size  */
+#ifndef ELOG_ASYNC_LINE_OUTPUT
+#ifndef ELOG_ASYNC_POLL_GET_LOG_BUF_SIZE
+#define ELOG_ASYNC_POLL_GET_LOG_BUF_SIZE         (ELOG_ASYNC_OUTPUT_BUF_SIZE - 4)
+#endif
+#else
 #ifndef ELOG_ASYNC_POLL_GET_LOG_BUF_SIZE
 #define ELOG_ASYNC_POLL_GET_LOG_BUF_SIZE         (ELOG_LINE_BUF_SIZE - 4)
 #endif
+#endif
 #endif /* ELOG_ASYNC_OUTPUT_USING_PTHREAD */
 
 /* asynchronous output log notice */
 static sem_t output_notice;
 /* asynchronous output pthread thread */
 static pthread_t async_output_thread;
-#endif /* ELOG_ASYNC_OUTPUT_USING_PTHREAD */
+#endif /* ELOG_ASYNC_OUTPUT_ENABLE */
 
 /* the highest output level for async mode, other level will sync output */
 #ifdef ELOG_ASYNC_OUTPUT_LVL