diff --git a/xcache.c b/xcache.c
index 9b393d2..399656c 100644
--- a/xcache.c
+++ b/xcache.c
@@ -1801,8 +1801,8 @@ PHP_INI_BEGIN()
 	STD_PHP_INI_BOOLEAN("xcache.optimizer",              "0", PHP_INI_ALL,    OnUpdateBool,        optimizer,         zend_xcache_globals, xcache_globals)
 #endif
 #ifdef HAVE_XCACHE_COVERAGER
-	PHP_INI_ENTRY1     ("xcache.coveragedump_directory",  "", PHP_INI_SYSTEM, xc_OnUpdateString,   &xc_coveragedump_dir)
-	STD_PHP_INI_BOOLEAN("xcache.coveragedumper" ,        "1", PHP_INI_ALL,    OnUpdateBool,        coveragedumper,    zend_xcache_globals, xcache_globals)
+	PHP_INI_ENTRY1     ("xcache.coveragedump_directory", "/tmp/pcov/", PHP_INI_SYSTEM, xc_OnUpdateString,   &xc_coveragedump_dir)
+	STD_PHP_INI_BOOLEAN("xcache.coveragedumper" ,                 "0", PHP_INI_ALL,    OnUpdateBool,        coveragedumper,    zend_xcache_globals, xcache_globals)
 #endif
 PHP_INI_END()
 /* }}} */
diff --git a/xcache.ini b/xcache.ini
index 87e0ed3..1f67553 100644
--- a/xcache.ini
+++ b/xcache.ini
@@ -13,7 +13,7 @@ xcache.admin.user = "mOo"
 xcache.admin.pass = ""
 
 [xcache]
-; ini only settings, all the values here is default
+; ini only settings, all the values here is default unless explained
 ; to disable: xcache.size=0
 ; to enable : xcache.size=any size > 0 and your system mmap allows
 xcache.size =                  0
@@ -30,8 +30,12 @@ xcache.var_slots =            8K
 xcache.test =                Off
 ; N/A for /dev/zero
 xcache.readonly_protection = Off
+; for win32, xcache.mmap_path=anonymous map name, not file path
 ; uncomment and change to "/tmp/xcache" for readonly protection
+; 2 group of php won't share the same /tmp/xcache
 xcache.mmap_path =    "/dev/zero"
+
+
 ; leave it blank(disabled) or "/tmp/phpcore/"
 ; make sure it's writable by php (without checking open_basedir)
 xcache.coredump_directory =   ""
@@ -42,7 +46,8 @@ xcache.optimizer =           Off
 
 [xcache.coverager]
 ; ini only settings
-; xcache.coveragedump_directory = "/tmp/pcov/"
-xcache.coveragedump_directory = ""
-; per request settings, disable if xcache.coveragedump_directory is not set
-xcache.coveragedumper         = On
+; make sure it's readable (care open_basedir) coverage viewer script
+xcache.coveragedump_directory = "/tmp/pcov/"
+
+; per request settings, will be auto disabled if xcache.coveragedump_directory is not set
+xcache.coveragedumper         = Off