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ref https://linear.app/tryghost/issue/ONC-111 - added composite index to posts_tags for post_id,tag_id for faster lookup - added composite index to posts for updated_at; this is commonly used by get helpers on the front end to display data like the latest posts In testing, this provided a very dramatic improvement for simple get helper requests like 'filter="id:-{{post.id}}+tag:sampleTag" limit="3"' which are by default sorted by updated_at desc. I'm not entirely clear why when sorting by published_at we do not need a composite index - so far it doesn't seem to be necessary. This should cover the primary cases for get helpers - the latest posts with a given tag or set of tags. |
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