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https://issues.apache.org/jira/browse/COUCHDB-1367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175168#comment-13175168
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Robert Newson commented on COUCHDB-1367:
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Correct, 'monotonically incrementing' means that the number always goes up but 
does *not* imply that it always goes up by exactly 1. Because it sorta kind 
*sounds* like that, I clarified with 'never goes down' and tried a synonym for 
monotonic. The changes feed will certainly have gaps, but no row N will have a 
lower update_seq than any previously seen row.

monotonic |ˌmänəˈtänik|
adjective
1 Mathematics (of a function or quantity) varying in such a way that it either 
never decreases or never increases.

                
> When settings revs_limit on db - the db increases its update_seq counter when 
> viewing stats - but not when getting changes
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: COUCHDB-1367
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1367
>             Project: CouchDB
>          Issue Type: Bug
>          Components: HTTP Interface
>    Affects Versions: 1.1.1
>         Environment: Any
>            Reporter: Henrik Hofmeister
>            Assignee: Bob Dionne
>            Priority: Minor
>              Labels: revs_limit
>
> If you put a number to _revs_limit on a db (to update it) - the 
> http://host/dbname/ info document gets an increase in update_seq number - 
> however the changes feed does not contain this change (while its not a 
> change). This causes the update_seq in the dbinfo doc and the last seq in the 
> changes feed to differ - which breaks any application depending on the 
> update_seq number as the expected sequence size of the db (in my case - 
> couchdb-lucene that will only respond to stale requests because it thinks its 
> not up to date)
> I know this is an edge case - but still its something fairly fundamental - 
> that clearly is not working as intended. 

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