[21:37:15] <Gerges>	 Hi
[21:37:57] <Gerges>	 Is there a guide for $wmgThumbsizeIndex
[21:46:18] <bd808>	 Gerges: the current values are at https://github.com/wikimedia/operations-mediawiki-config/blob/master/wmf-config/InitialiseSettings.php#L5091-L5097
[21:46:51] <bd808>	 Are you looking for some essay about why certain values are used or something else?
[21:48:46] <Gerges>	 How do I set the default image size to 300 pixels?
[21:50:41] <bd808>	 on a stock wiki per https://www.mediawiki.org/wiki/Manual:$wgThumbLimits it would be setting `$wgDefaultUserOptions['thumbsize'] = 5` to set it as the default option for new accounts.
[21:52:05] <bd808>	 on a Wikimedia wiki usually it would be `$wmgThumbsizeIndex = 6` but would vary a bit because there are some wikis in the farm that have customized $wgThumbLimits
[21:53:52] <Gerges>	 Well, so the values wmgThumbsizeIndex start from 0 to 7
[22:00:31] <Gerges>	 bd808: I'm going to work on this ticket https://phabricator.wikimedia.org/T357943, Do you think that increasing the default image size to 300 pixels in English Wikivoyage will negatively affect the server?
[22:07:45] <bawolff>	 you'd probably want to ask someone working on the media storage or varnish cache that
[22:07:57] <bawolff>	 But english wikivoyage is a fairly small wiki
[22:08:12] <bawolff>	 So there is a reasonable chance it would be fine
[22:40:37] <bd808>	 Gerges: I *think* that picking a size from the existing `$wgThumbLimits` array is generally ok because I *think* that we already pre-generate all of those image size variants. As bawolff said getting an opinion from someone who knows deeply about the practical implications of the change would probably make your merge + deploy go more smoothly.