Zabbixのグラフで日付表示時に時刻を省略して縦幅を縮めるパッチ。Zabbix 2.0.6 にて動作確認済み。 /usr/share/zabbix とかに行って patch -p0 で食わせてください。

class.cchart.php.diff

--- include/classes/class.cchart.php.orig	2013-08-02 07:55:09.131739793 +0000
+++ include/classes/class.cchart.php	2013-08-02 07:58:21.199739718 +0000
@@ -34,7 +34,7 @@
 		$this->skipRightScale = 0; // in case if right axis should be drawn but doesn't contain any data
 		$this->ymin_itemid = 0;
 		$this->ymax_itemid = 0;
-		$this->legendOffsetY = 90;
+		$this->legendOffsetY = 50;
 		$this->percentile = array(
 			'left' => array(
 				'percent' => 0, // draw percentage line
@@ -1249,7 +1249,7 @@
 
 		// first && last
 		// start
-		$str = zbx_date2str(_('d.m H:i'), $this->stime);
+		$str = zbx_date2str(_('d.m'), $this->stime);
 		$dims = imageTextSize(8, 90, $str);
 		imageText(
 			$this->im,
@@ -1264,7 +1264,7 @@
 		// end
 		$endtime = $this->to_time;
 
-		$str = zbx_date2str(_('d.m H:i'), $endtime);
+		$str = zbx_date2str(_('H:i'), $endtime);
 		$dims = imageTextSize(8, 90, $str);
 		imageText(
 			$this->im,
@@ -1283,7 +1283,7 @@
 				$date_format = _('d.m');
 			}
 			else {
-				$date_format = _('d.m H:i');
+				$date_format = _('d.m');
 			}
 
 			$color = $this->graphtheme['highlightcolor'];