[OPEN-ILS-GENERAL] search results mystery

[Kathy Lussier]

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
>
> hbrennan at cityofhomer-ak.gov
>
> 907-235-3180 (main)
>
> 907-435-3154 (direct)
>

-- 
Kathy Lussier
Project Coordinator
Massachusetts Library Network Cooperative
(508) 343-0128
klussier at masslnc.org
Twitter: http://www.twitter.com/kmlussier

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