Hi Holly,
I'm a bit fuzzy on the details for this, but we ran across a similar
situation a few months ago when using copy location limiters. There is a
very brief IRC discussion this issue at
http://irc.evergreen-ils.org/evergreen/2015-10-21#i_210396 . I meant to
file a bug report, but I never got around it.
Basically, the estimated results count starts to get inaccurate once you
hit something like 1,000 results (this is configured locally and could
be different on your system.) The copy location limiters are applied
after the core search, so, even though the final count is way below that
number, your core search without the limiters actually exceeded that
number. I'm guessing the same happens with copy location groups.
I'm sure somebody else here could explain better than I just did, but I
just wanted to let you know that we've seen this issue too.
Kathy
On 01/28/2016 05:17 PM, Holly Brennan wrote:
I am trying to solve the mystery of “changing” search results when
using a Library search filter. For my single-branch library , the
Library filter is just different Copy Location Groups.
I can’t find my specific issue on Launchpad, but I’m also not really
sure what’s going on. This issue happens with all my Copy Location
Groups, but here’s what happens with a specific, basic example:
I have a Copy Location Group consisting of just a single copy
location, HPL Display – Read 15 in ’16, in the Location Group named
Read 15 in ‘16:
When I search using only this “Library” filter, like this…
I get these results on page 1, with about 210 results:
Jumping to Page 8 of results, and suddenly I have about 115 results:
Jumping to Page 10 of results, I have about 92 results:
The results are “consistent” in that if I return to page 1 (or any
other page), the number of results is the same as the first time I
viewed that particular page (Page 1 always says 210, Page 8 always
says 115). BUT THEN, an hour later if I search again, the first page
says 270 results… consistently.
So my question, I guess, is “What’s the deal?!” Is the interpretation
of “about” in the number of search results really THAT elusive?
Help please, and thank you.
-Holly
Holly Brennan
Library Technology Specialist
Homer Public Library, Alaska
[email protected]
907-235-3180 (main)
907-435-3154 (direct)
--
Kathy Lussier
Project Coordinator
Massachusetts Library Network Cooperative
(508) 343-0128
[email protected]
Twitter: http://www.twitter.com/kmlussier
