nanog mailing list archives
Re: How do you (not how do I) calculate 95th percentile?
From: Alex Rubenstein <alex () nac net>
Date: Wed, 22 Feb 2006 15:24:09 -0500 (Eastern Standard Time)
(I did this fast, and, who knows; I could be off my an order or two of magnitude)
Most people are using 64 bit counters. This avoids the wrapping problem (assuming you don't have 100GE and poll more then once every 5 years :-)).
2^64 is 18,446,744,073,709,551,616 bytes. 100 GE (100,000,000,000 bits/sec) is 12,500,000,000 bytes/sec. It would take 1,475,739,525 seconds, or 46.79 years for a counter wrap. -- Alex Rubenstein, AR97, K2AHR, alex () nac net, latency, Al Reuben Net Access Corporation, 800-NET-ME-36, http://www.nac.net
Current thread:
- How do you (not how do I) calculate 95th percentile? Jo Rhett (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Tom Sands (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? David W. Hankins (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Tom Sands (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? David W. Hankins (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Warren Kumari (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Alex Rubenstein (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Warren Kumari (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Alex Rubenstein (Feb 22)
- <Possible follow-ups>
- RE: How do you (not how do I) calculate 95th percentile? Russell, David (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Daniel Roesen (Feb 23)
- RE: How do you (not how do I) calculate 95th percentile? Greenhagen, Robin (Feb 22)
- Re: How do you (not how do I) calculate 95th percentile? Tom Sands (Feb 22)