I think you're requesting the 330px standard size. Can you switch to 500px instead? That is the size that is being advertised as 2x for default thumb size and hit ratio in swift should be much higher than the other standard size (330px)

note that thumbnails don't get replicated across swift clusters in different DCs, so changes to runtime after the switchover is actually expected.

In T421688#11763897, @Ladsgroup wrote:

I think you're requesting the 330px standard size. Can you switch to 500px instead?

We could, but ideally we wouldn't want to unless necessary as the larger the thumbnail the more likely it would be too large for PhotoDNA (they impose a upper limit on the file height)

In T421688#11763978, @Dreamy_Jazz wrote:

In T421688#11763897, @Ladsgroup wrote:

I think you're requesting the 330px standard size. Can you switch to 500px instead?

We could, but ideally we wouldn't want to unless necessary as the larger the thumbnail the more likely it would be too large for PhotoDNA (they impose a upper limit on the file height)

Another good one is 250px (default thumb size, 1x), you could try to prefer those instead if height is large?

In T421688#11764035, @Ladsgroup wrote:

In T421688#11763978, @Dreamy_Jazz wrote:

In T421688#11763897, @Ladsgroup wrote:

I think you're requesting the 330px standard size. Can you switch to 500px instead?

We could, but ideally we wouldn't want to unless necessary as the larger the thumbnail the more likely it would be too large for PhotoDNA (they impose a upper limit on the file height)

Another good one is 250px (default thumb size, 1x), you could try to prefer those instead if height is large?

Yeah, 250px should be fine

Change #1287869 had a related patch set uploaded (by Dreamy Jazz; author: Dreamy Jazz):

[mediawiki/extensions/MediaModeration@master] Change $wgMediaModerationThumbnailWidth to 250

https://gerrit.wikimedia.org/r/1287869

Change #1287869 merged by jenkins-bot:

[mediawiki/extensions/MediaModeration@master] Change $wgMediaModerationThumbnailWidth to 250

https://gerrit.wikimedia.org/r/1287869

Rate of using source image over thumbnail has dramatically decreased after the train reached all wikis with this patch:

I think given this change it probably makes sense to do a rescan of all unscannable images because it seems to have improved the chance an image can successfully scan

Mentioned in SAL (#wikimedia-operations) [2026-05-26T21:27:45Z] <Dreamy_Jazz> Running /usr/local/bin/foreachwikiindblist "all.dblist - mediamoderation-continuous-scan.dblist - preinstall.dblist" extensions/MediaModeration/maintenance/scanFilesInScanTable.php --use-jobqueue --sleep=1 --poll-sleep=10 --verbose in tmux session - T421688