It sounds like the revs_limit parameter is what you are looking for. I
couldn't find it in the docs but you can see it in the code here:
https://github.com/couchbase/sync_gateway/blob/master/src/github.com/couchbaselabs/sync_gateway/rest/config.go#L79

You might find more people working on this stuff in the mobile group:
https://groups.google.com/forum/#!forum/mobile-couchbase

Note that the metadata is tracked so that when a mobile device that has
been disconnected for a while reconnects, it can agree with everyone about
where it's changes fit in the history. Setting rev stemming to a small
value is fine when you know you won't have documents changed on more than
one device. By default we ship with a large revs_limit parameter to err on
the side of robustness.

Chris


On Wed, Jul 2, 2014 at 10:52 AM, Chris Fuentes <[email protected]>
wrote:

> To be honest, I'm not sure what portion of the Couchbase stack it is most
> directly related to:
>
> CBL (mobile)/REST API is what generates and updates the documents, but as
> I understand it the sync_gateway is responsible for handling
> revisions/history. I would have expected the old revisions and the old
> metadata to be deleted during the compaction cycle that we run on the
> sync_gateway every 24 hours. While this does delete the old revisions of
> the documents, the metadata pertaining to the old documents is still
> present in the current revisions.
>
> So I'm not really sure which service  (couchbase server, sync_gateway, or
> CBL) is most responsible for the excessive bloating of metadata in the
> server. That's really what I'm trying to figure out. I was hoping there was
> just some configurable field somewhere on the Couchbase server or sync
> gateway that would stop keeping track of this old data, like
> "maintain_sync_history: false" or something.
>
>
>
> On Wednesday, July 2, 2014 1:44:29 PM UTC-4, Matt Ingenthron wrote:
>
>> By the way, on re-reading that, I’m not 100% certain this is SyncGateway
>> related, but I believe it is from your last message.  If you could
>> clarify
>> Chris, that’d be great.
>>
>> Thanks,
>>
>> Matt
>>
>> On 7/2/14, 10:42 AM, "Matt Ingenthron" <[email protected]> wrote:
>>
>> >Hi Chris,
>> >
>> >(cc¹ing some other folks)
>> >
>> >On 7/1/14, 9:28 PM, "Chris Fuentes" <[email protected]> wrote:
>> >
>> >>The problem is not with CouchBaseLite to my knowledge - I'm talking
>> about
>> >>in the actual CouchBase database, there are excessive metadata auto
>> >>generated as a result of using the CBL API.
>> >
>> >This is true, however it¹s really part-and-parcel of the Couchbase
>> Mobile
>> >team, including Couchbase Lite and SyncGateway.  That¹s what provides
>> the
>> >REST interface you mention.
>> >
>> >>
>> >>Even if there is some constant in the app settings that I can change,
>> >>this wouldn't resolve the issue for using the http REST api to modify
>> >>documents.
>> >
>> >Hopefully Jens and JChris can help address how they expect to handle
>> this
>> >with SyncGatway on Couchbase Server.
>> >
>> >Thanks,
>> >
>> >Matt
>> >
>> >--
>> >Matt Ingenthron
>> >Couchbase, Inc.
>> >
>>
>>
>> --
>> Matt Ingenthron
>> Couchbase, Inc.
>>
>>
>>
>>
>>


-- 
—
Chris Anderson  @jchris
http://www.couchbase.com

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