Glad this worked out. Quick tip then, unless you run this on an 8-core (or 
more) machine, you might want to look into reducing your q for this database. 
q=2 or $num_cores is a good rule of thumb. You can use our couch-continuum tool 
to migrate an existing db: https://npmjs.com/couch-continuum

Cheers
Jan
—

> On 2. May 2019, at 14:17, Frank Röhm <[email protected]> wrote:
> 
> OK, I found it.
> In the 8 shards subdirectories (from 00000000-1fffffff to e0000000-ffffffff) 
> there was still 8 frwiki directories (frwiki.1510609658.couch) with each 5 GB.
> I deleted them with:
> 
> find . -name frwiki.1510609658.couch -delete
> 
> from the shards dir and gone they are.
> Hopefully it won’t affect my CouchDB, but as I heard this is very robust ;)
> 
> I think I can stick to the v2.x now, no need to downgrade now, ouff.
> 
> frank
> 
>> Am 02.05.2019 um 07:25 schrieb Joan Touzet <[email protected]>:
>> 
>> Look for a .deleted directory under your data/ directory. The files may not 
>> have been deleted but moved aside due to the enable_database_recovery 
>> setting, or because the DB was still in use when you restarted CouchDB.
>> 
>> Another useful command is:
>> 
>> $ du -sh /opt/couchdb/data/*
>> 
>> which should tell you where the storage is being used. Does this show 
>> anything useful to you?
>> 
>> -Joan
>> 
>>> On 2019-05-01 2:22 p.m., Frank Walter wrote:
>>> Hello
>>> I have CouchDB v2.3.1 (on Ubuntu 14.04) and I use it only for creating
>>> Wikipedia databases with mwscrape.
>>> My shards folder was too big, over 50 GB big, so I deleted one big db
>>> (frwiki) which had 32 GB in Fauxton. That db is gone now.
>>> After this, I thought now my shards folder should be about 20 GB but it
>>> is still 52 GB.
>>> I don't find any documentation about that in the CouchDB Doc.
>>> I restarted CouchDB (/etc/init.d/couchdb restart) but nothing changes.
>>> How can I reduce the size of shards? How can I get rid of this ghost-db?
>>> My next step would be, if I cannot solve this issue, to uninstall
>>> CouchDB 2.x and reinstall 1.x, because I dont need that feature of
>>> cluster server anyway. I see only inconvenience for my use.
>>> Thanks
>>> frank
> 

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