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Improve the performance of fetching event reports over the admin API when there are many of them and the requester has paginated far down the list. #16620
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Signed-off-by: Olivier Wilkinson (reivilibre) <[email protected]>
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What do the query plans look like before and after, OOI? |
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Partial fix to #16619
General idea: defer the join to
eventsuntil after the offset has been applied. It's hard to get an unbiased measurement for this, but the old query took ~3s and the new query took ~500ms for a given query (identical results).It'd be nicer to add proper indices and defer the other join too (and even change the pagination scheme to not use OFFSET), but this is all I had for a drive-by improvement.
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developOriginal commit schedule, with full messages:
Improve performance of fetching event reports when there are many of them