kocolosk commented on issue #2115: Update default config settings (Q, max_document_size, etc.) URL: https://github.com/apache/couchdb/issues/2115#issuecomment-521493367 I erred on the side of fewer shards because we have splitting but not merging, and because the initial setting of 8 was derived from some of our deployments which I'd wager are larger than average. But I'm happy to go along with whatever consensus (including retaining the current default if that's what folks want). Attachments aren't included in the computation for `couchdb.max_document_size`, only the actual JSON fields and values. That said, there are absolutely users in the wild with JSON docs larger than 1 MB, and this change in defaults could certainly surprise them. In 3.x they'll be able to work around it by changing the default on their server, but this is meant as a signal to re-think the data model. My experience has been that those large docs are problematic for a number of reasons; the somewhat fuzzy limit at which the view engine breaks, and the intense write amplification when updating any field of the document are two examples that come to mind.
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