Update system.sql

data/sql/system.sql

@@ -8,6 +8,7 @@ CREATE TABLE IF NOT EXISTS `network` (
   `up_packets` INTEGER,
   `addtime` INTEGER
 );
+CREATE INDEX addtime_idx ON network(`addtime`);
 
 CREATE TABLE IF NOT EXISTS `cpuio` (
   `id` INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -15,6 +16,7 @@ CREATE TABLE IF NOT EXISTS `cpuio` (
   `mem` TEXT,
   `addtime` INTEGER
 );
+CREATE INDEX addtime_idx ON cpuio(`addtime`);
 
 CREATE TABLE IF NOT EXISTS `diskio` (
   `id` INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -26,6 +28,7 @@ CREATE TABLE IF NOT EXISTS `diskio` (
   `write_time` INTEGER,
   `addtime` INTEGER
 );
+CREATE INDEX addtime_idx ON diskio(`addtime`);
 
 CREATE TABLE IF NOT EXISTS `load_average` (
   `id` INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -34,4 +37,5 @@ CREATE TABLE IF NOT EXISTS `load_average` (
   `five` REAL,
   `fifteen` REAL,
   `addtime` INTEGER
-);
+);
+CREATE INDEX addtime_idx ON load_average(`addtime`);