[Koha] Anyone have an annual circulation of over 10 million transactions

[Kate Boyle]

Thank you to all who replied to my query.   Yes, I was referring to an annual circulation statistic (checkouts to patrons)  at a large library or a consortia group of libraries of around 10 million.   

SCLS seems to have hit the mark.   Thank you. 

Kate Boyle
Reaching Across Illinois Library System
Burr Ridge Office
Phone: 630.734.5162
Fax: 630.734.5050
kate.boyle at railslibraries.info

-----Original Message-----
From: koha-bounces at lists.katipo.co.nz [mailto:koha-bounces at lists.katipo.co.nz] On Behalf Of Greg Barniskis
Sent: Friday, August 09, 2013 8:44 AM
To: Manos PETRIDIS
Cc: koha at lists.katipo.co.nz
Subject: Re: [Koha] Anyone have an annual circulation of over 10 million transactions

On 8/8/2013 3:08 PM, Manos PETRIDIS wrote:
> Although 10 million transactions are an absurdly large circulation, I 
> wonder if by "transactions" you mean db transactions, including that 
> is workload incurred by OPAC users, remote searches, administrative work etc.?

To be clear, the figure I cited for SCLS is for circulation only, with
12 million items being borrowed by patrons. There are of course many more db transactions taking place, with a proportionally high number of searches and (one hopes) all of those items also being returned. Plus cataloging, records maintenance, reports, etc.

Math clarification: some of the earlier discussion cited circs per second, but that's going one step too far. Also, the 8 hours assumption isn't quite right. Many of our larger sites are open 10-12 hours per day. Also, because of the public web interface and the addition of a TALKINGtech i-tiva telephony interface, patron self-service renewals can take place 24/7. So, rounded off a bit...

12 million issues and renewals in 2012
/ 365 days
/ 24 hours
/ 60 minutes
------------
average 23 circs per minute

Of course the really interesting question is about peak load, not average. Based on reports of circulation by time of day, our busiest hour is Monday afternoon, 16:00-17:00. In that time slot our peak load averages to 77 cpm, or 1.28 per second.

Large? Yes. Absurd? Not yet... but we're still growing. =)

--
Greg Barniskis, Computer Systems Integrator South Central Library System (SCLS) <gregb at scls.lib.wi.us>, (608) 242-4716 _______________________________________________
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