All of these parameters *are* documented in the default.ini file, starting at line 364. It's something!
https://github.com/apache/couchdb/blob/master/rel/overlay/etc/default.ini#L364 ----- Original Message ----- > From: "Andrea Brancatelli" <abrancate...@schema31.it> > To: user@couchdb.apache.org > Cc: "Adam Kocoloski" <kocol...@apache.org> > Sent: Wednesday, November 7, 2018 2:41:38 AM > Subject: Re: How many replications per server? > > OK. Thanks a lot. > > I'll investigate a bit on how they work and then will try to update > the > documentation accordingly. > > I'm not very fluent in Erlang, if I have doubts I'll have to ask for > your help again. > > --- > > Andrea Brancatelli > > On 2018-11-07 00:06, Adam Kocoloski wrote: > > > Hmph, that seems to be an oversight in the documentation! Here's > > the set of performance-related configuration options that can be > > specified as top-level fields in the replication specification: > > > > worker_batch_size > > worker_processes > > http_connections > > connection_timeout > > retries_per_request > > socket_options > > checkpoint_interval > > use_checkpoints > > > > These are all documented in the [replicator] section of the > > configuration docs, which is where you'd go to set the defaults > > for all replications mediated by that server: > > > > http://docs.couchdb.org/en/stable/config/replicator.html#replicator > > <http://docs.couchdb.org/en/stable/config/replicator.html#replicator> > > > > Configuring one of those fields in the replication doc will always > > override the default for the server. There are several other > > additional fields that are meaningful in a replication document -- > > I haven't checked to see if every one is documented. The code that > > validates them all is here: > > > > https://github.com/apache/couchdb/blob/2.2.0/src/couch_replicator/src/couch_replicator_docs.erl#L469-L529 > > <https://github.com/apache/couchdb/blob/2.2.0/src/couch_replicator/src/couch_replicator_docs.erl#L469-L529> > > > > Looks like we have a bit of homework to do here ... Cheers, > > > > Adam > > > > On Nov 6, 2018, at 2:15 AM, Andrea Brancatelli > > <abrancate...@schema31.it> wrote: > > > > Hi Adam, > > > > can you elaborate a bit on the "It's also possible to override > > resource > > settings on a per-replication basis" topic? > > > > I can't seem to find anything here: > > http://docs.couchdb.org/en/stable/replication/replicator.html > > > > Neither here: > > http://docs.couchdb.org/en/stable/api/server/common.html#replicate > > > > --- > > > > Andrea Brancatelli > > > > On 2018-10-30 17:17, Adam Kocoloski wrote: > > > > The `worker_processes` and `http_connections` in particular can > > have a significant impact on the resource consumption of each > > replication job. If your goal is to host a large number of > > lightweight replications you could reduce those settings, and then > > configure the scheduler to keep a large `max_jobs` running. It's > > also possible to override resource settings on a per-replication > > basis.
