diff --git a/README_CN.md b/README_CN.md
index 1751b9e..ccf9cde 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -130,6 +130,7 @@ array {
 |apm.ignored  | array的可选选项 |忽略性能分析中的某些函数 |
 |apm.rate  | 0 - 100 |频率设置，按照0到100的百分比，如果auto设为0，此选项不会生效，如设置大于100会每次开启，等于0则不开启。当不需要此选项时，请注释掉|
 |apm.debug  | GET参数名 |此选项可通过特定的GET参数开启性能分析，注释即可关闭。如设置auto = 0，同时GET参数中带有设置值 (例如 http://localhost/?apm_debug) ，也会开启性能分析，优先级高于auto。|
+|apm.scratch_buf  | 函数长度缓冲区大小 |默认值：512 |
 
 ```
 apm.auto = 1
@@ -146,6 +147,7 @@ apm.ignored[] = md5
 ;apm.rate = 30
 
 apm.debug = apm_debug
+apm.scratch_buf = 1024
 ```
 
 ## 日志管理界面
diff --git a/extension/php_xhprof_apm.h b/extension/php_xhprof_apm.h
index 6b5237a..df97331 100644
--- a/extension/php_xhprof_apm.h
+++ b/extension/php_xhprof_apm.h
@@ -41,7 +41,7 @@ extern zend_module_entry xhprof_apm_module_entry;
  */
 
 /* XHProf_APM version                           */
-#define XHPROF_APM_VERSION       "1.0.0"
+#define XHPROF_APM_VERSION       "1.1.0"
 
 #define APM_FUNC_HASH_COUNTERS_SIZE   1024
 
@@ -208,6 +208,8 @@ ZEND_BEGIN_MODULE_GLOBALS(apm)
 
     int debug;
 
+    int scratch_buf;
+
     /* counter table indexed by hash value of function names. */
     zend_ulong func_hash_counters[APM_FUNC_HASH_COUNTERS_SIZE];
 
diff --git a/extension/xhprof_apm.c b/extension/xhprof_apm.c
index 8222c7f..73923a5 100644
--- a/extension/xhprof_apm.c
+++ b/extension/xhprof_apm.c
@@ -98,6 +98,7 @@ PHP_GINIT_FUNCTION(apm)
     apm_globals->trace_callbacks = NULL;
     apm_globals->ignored_functions = NULL;
 	apm_globals->debug = 0;
+	apm_globals->scratch_buf = SCRATCH_BUF_LEN;
 
     ZVAL_UNDEF(&apm_globals->stats_count);
 
@@ -294,6 +295,7 @@ void hp_clean_profiler_state()
 	APM_G(entries) = NULL;
 	APM_G(ever_enabled) = 0;
 	APM_G(debug) = 0;
+	APM_G(scratch_buf) = SCRATCH_BUF_LEN;
 
     hp_clean_profiler_options_state();
 }
@@ -602,11 +604,11 @@ void hp_mode_hier_beginfn_cb(hp_entry_t **entries, hp_entry_t *current)
 void hp_mode_hier_endfn_cb(hp_entry_t **entries)
 {
 	hp_entry_t   *top = (*entries);
-	zval            *counts, files_stack;
-    char            symbol[SCRATCH_BUF_LEN];
-	long int        mu_end;
-	long int        pmu_end;
-    double          wt, cpu;
+	zval         *counts, files_stack;
+    char         symbol[APM_G(scratch_buf)];
+	long int     mu_end;
+	long int     pmu_end;
+    double       wt, cpu;
 
 	/* Get end tsc counter */
 	wt = cycle_timer() - top->tsc_start;
@@ -1494,6 +1496,7 @@ int hp_rshutdown_php(zval *data, int debug)
 
 size_t write_data(void *buffer, size_t size, size_t nmemb, void *userp)
 {
+    return 0;
 }
 
 int hp_rshutdown_curl(zval *data, int debug)
@@ -1643,6 +1646,12 @@ PHP_RINIT_FUNCTION(xhprof_apm)
         }
     }
 
+    pzval = hp_zval_at_key("scratch_buf", apm_config);
+    if (pzval) {
+        convert_to_long(pzval);
+        APM_G(scratch_buf) = Z_LVAL_P(pzval);
+    }
+
     if (!enable) {
         zval_ptr_dtor(&configs);
         return SUCCESS;