This tuned out to be interesting, results vary heavily for different platforms.
I included `perftest.html` into Photon design doc. The utility gives good insight how q,n impact doc creation, doc update, validate + update, and viewindex create/update – for a particular CouchDB instance. Common observations: * q=1 is only ok for rare special cases (like DBs with dozen docs) * it’s ok to have q==cores or q==cores+1 or even cores+2: write perf drops a little, but viewindex update is bit faster * excessive q (say, more than cores×2) negatively impacts direct write perf: having q8 for 2core at least halves write perf for most commodity/lean platforms and hw cfg. ermouth чт, 11 июл. 2019 г. в 18:17, Joan Touzet <woh...@apache.org>: > On 2019-07-11 8:05, ermouth wrote: > >> to help with the documentation step > > > > Probably. Please give me a hint what you need. > > What default settings right now are wrong for a system with low RAM, low > CPU, and slow disk - such as a RaspberryPi v1, or a $15/mo AWS server? > > -Joan > >
