FHIR Chat · How many resources at once

Stream: Covid-19 Response

Topic: How many resources at once

Michael Donnelly (May 15 2020 at 01:12):

I've got searches working for multiple locations (including leaving location out and getting all locations). If you do a search for the last two months for the CSC Measure for all locations, it has a lot of results. The first thousand take more than 30 seconds and weigh in at more than 5 MB.

Michael Donnelly (May 15 2020 at 01:13):

Is 30 seconds too long? (Indicate with thumbs up / thumbs down)

Michael Donnelly (May 15 2020 at 01:13):

Is 5 MB too big? (same)

Michael Donnelly (May 15 2020 at 01:14):

If need be, I can set a smaller limit than the base limit of 1,000.

Abbie Watson (May 15 2020 at 01:52):

The 5MB size isn't a problem, it's the number of records and the memory references to them (and subsequent garbage collection and memory leaks). I vote for 200 or 500 records.

Also, does your server support count? There's a URL parameter for specifying the number of records to be returned. Worth encouraging in the IG.

Michael Donnelly (May 15 2020 at 01:53):

Sure does.

Michael Donnelly (May 15 2020 at 01:53):

If you feel like it, feel free to hit the server and see how memory is for different numbers.

Abbie Watson (May 15 2020 at 01:54):

I'd be inclined to provide that as a UI option, and let the user decide how many records they want to display. And pass that preference along in the count parameter.

Michael Donnelly (May 15 2020 at 01:54):

https://connectathon.epic.com/Interconnect-Fhir-Unsecure/api/FHIR/R4/MeasureReport?measure=http://hl7.org/fhir/us/saner/Measure/CDCPatientImpactAndHospitalCapacity&period=ge2020-03-15&_count=200

Michael Donnelly (May 15 2020 at 01:54):

Makes sense.

Abbie Watson (May 15 2020 at 01:54):

Perfect. Include in the report-out and IG updates?

Michael Donnelly (May 15 2020 at 01:55):

Wilco.

Michael Donnelly (May 15 2020 at 01:58):

~~(We do appear to have an escaping bug in the next link on the second page for the third page. Looking into that now....)~~

Abbie Watson (May 15 2020 at 02:02):

Heh. Computers.

FYI... I'm wrapping up the Gravity track. Apparently nobody else showed up with a PatientApp or ScreeningApp, so I was the only person the PMEHR folks had to connectathon with. Wrapping that up, and then deploying a patch to support the Push usecase on Inferno, and should have the Intermediary/Hub functionality in place.