adjust switch_yield times in switch_core_sql_db_thread() and pool_thread()

src/switch_core_memory.c

@@ -548,7 +548,7 @@ static void *SWITCH_THREAD_FUNC pool_thread(switch_thread_t *thread, void *obj)
 				goto done;
 			}
 		} else {
-			switch_yield(100000);
+			switch_yield(1000000);
 		}
 	}
 

src/switch_core_sqldb.c

@@ -898,7 +898,7 @@ static void *SWITCH_THREAD_FUNC switch_core_sql_db_thread(switch_thread_t *threa
 			wake_thread(0);
 			sec = 0;
 		}
-		switch_yield(1000);
+		switch_yield(1000000);
 	}