[TD-1986]<fix>: default days to 10 instead of 2

src/inc/taosdef.h

@@ -334,7 +334,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size, void* buf
 
 #define TSDB_MIN_DAYS_PER_FILE          1
 #define TSDB_MAX_DAYS_PER_FILE          3650 
-#define TSDB_DEFAULT_DAYS_PER_FILE      2 
+#define TSDB_DEFAULT_DAYS_PER_FILE      10
 
 #define TSDB_MIN_KEEP                   1        // data in db to be reserved.
 #define TSDB_MAX_KEEP                   365000   // data in db to be reserved.