Date: Sat, 4 Jan 2003 09:29:38 -0500 From: "Matthew Emmerton" <matt@gsicomp.on.ca> To: "Bsd Neophyte" <bsdneophyte@yahoo.com>, <freebsd-questions@FreeBSD.ORG> Subject: Re: utility that measure electricty usage? Message-ID: <006801c2b3fd$ba6f0150$1200a8c0@gsicomp.on.ca> References: <20030104135220.60449.qmail@web20108.mail.yahoo.com>
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> i know there is something you can put on the socket to measure how much > current is being drawn... but i was wondering if there was some utility > that i could install on my server to measure the power usage for the > server? i'd like to make a chart to see if this device is really > impacting the electricity bill. You can find out the worst-case scenario by hand: 1) Take the wattage of the power supply of the system (ie P = 300W) 2) Determine the amount of time this server operates per month (ie t = 24 hours x 31 days = 744 hours) 3) Compute kWh: P / 1000 * t = 300 / 1000 * 744 = 223.2 kWh In my neck of the woods, electricity costs 4.9 cents per kWh, so my one server costs me $11.16/month to run. Of course, you should also take into account the power used by things like monitors, printers, and network equipment. -- Matt Emmerton To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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