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How to monitor performance - Revision history
2026-04-13T00:30:45Z
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Scott: Created page with ' == disk == <pre> $ hdparm -Tt /dev/hda /dev/hda: Timing cached reads: 1468 MB in 2.00 seconds = 733.01 MB/sec Timing buffered disk reads: 120 MB in 3.04 seconds = 39.41 MB…'
2011-02-02T22:57:50Z
<p>Created page with ' == disk == <pre> $ hdparm -Tt /dev/hda /dev/hda: Timing cached reads: 1468 MB in 2.00 seconds = 733.01 MB/sec Timing buffered disk reads: 120 MB in 3.04 seconds = 39.41 MB…'</p>
<p><b>New page</b></p><div><br />
== disk ==<br />
<pre><br />
$ hdparm -Tt /dev/hda<br />
/dev/hda:<br />
Timing cached reads: 1468 MB in 2.00 seconds = 733.01 MB/sec<br />
Timing buffered disk reads: 120 MB in 3.04 seconds = 39.41 MB/sec<br />
</pre><br />
<br />
for SMART-enabled disks<br />
<pre><br />
smartctl -a /dev/hda<br />
</pre><br />
<br />
== Memory ==<br />
<pre><br />
$ free -m (in MB)<br />
<br />
total used free shared buffers cached<br />
Mem: 503 375 128 0 55 240<br />
-/+ buffers/cache: 79 424<br />
Swap: 1023 0 1023<br />
</pre><br />
<br />
== Real-time monitoring ==<br />
Use the <code>top</code> and <code>atop</code> commands.<br />
<br />
== Historical monitoring ==<br />
Use the <code>sar</code> package.</div>
Scott