diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 82e9e484b..9ef9f5571 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -37,7 +37,7 @@
 #include <srs_kernel_utility.hpp>
 
 // the max size of a line of log.
-#define LOG_MAX_SIZE 4096
+#define LOG_MAX_SIZE 8192
 
 // the tail append to each log.
 #define LOG_TAIL '\n'
diff --git a/trunk/src/protocol/srs_service_log.cpp b/trunk/src/protocol/srs_service_log.cpp
index 3d711343b..ca30daf2f 100644
--- a/trunk/src/protocol/srs_service_log.cpp
+++ b/trunk/src/protocol/srs_service_log.cpp
@@ -33,7 +33,7 @@ using namespace std;
 #include <srs_kernel_utility.hpp>
 #include <srs_protocol_utility.hpp>
 
-#define SRS_BASIC_LOG_SIZE 1024
+#define SRS_BASIC_LOG_SIZE 8192
 
 SrsThreadContext::SrsThreadContext()
 {