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From "[mRg]" <emar...@gmail.com>
Subject Re: Couch not releasing deleted files
Date Wed, 15 Sep 2010 07:49:02 GMT
Yes there are 6 views (2 design docs)

On 14 September 2010 21:51, Adam Kocoloski <kocolosk@apache.org> wrote:

> Were there any view indexes on that DB?  My suspicion is that
> couch_view_group misses a step somewhere in its dance and keeps a reference
> to an old #db{}
>
> Adam
>
> On Sep 14, 2010, at 4:46 PM, [mRg] wrote:
>
> > It was just on a DB with a lot of writes (documents having lots of
> > revisions, rather that lots of new docs), the database grows as expected
> but
> > after just doing a simple compact on the db the old files still seem to
> be
> > on disk as reported previously.
> >
> > It seems its been around a while now as (as far as we can see) 0.11 / 1.0
> > and 1.0.1 all have the same issue, when we replicated the same data over
> to
> > the newer versions the same identical problem happened.
> >
> > On 14 September 2010 14:49, Robert Newson <robert.newson@gmail.com>
> wrote:
> >
> >> This was mentioned at CouchCamp, several developers suspect there's a
> >> subtle bug in the code where file descriptors are not being closed
> >> under some conditions.
> >>
> >> Did the OP identify a particular sequence that led here?
> >>
> >> B.
> >>
> >> On Mon, Sep 13, 2010 at 6:25 PM, Juan Jose Comellas <
> juanjo@comellas.org>
> >> wrote:
> >>> I'm pretty certain it's a bug in CouchDB. I haven't checked the code,
> but
> >>> what is happening is that CouchDB is keeping file descriptors
> >> corresponding
> >>> to deleted files open, probably after compacting a database. I'm
> >> inferring
> >>> this based on the fact that with lsof I saw several cases of two files
> >> with
> >>> the same name (one deleted and one not) opened by CouchDB.
> >>>
> >>>
> >>> On Mon, Sep 13, 2010 at 7:28 PM, [mRg] <emargee@gmail.com> wrote:
> >>>
> >>>> Is this an issue with the OS or with Couch/Beam itself ?
> >>>>
> >>>> On 10 September 2010 16:57, Juan Jose Comellas <juanjo@comellas.org>
> >>>> wrote:
> >>>>
> >>>>> It also happened to me with Ubuntu 8.04 and CouchDB 0.10.x. The
only
> >> way
> >>>> I
> >>>>> found to solve the problem was by restarting CouchDB.
> >>>>>
> >>>>>
> >>>>> On Thu, Sep 9, 2010 at 10:25 AM, [mRg] <emargee@gmail.com>
wrote:
> >>>>>
> >>>>>> [CouchDB Version : 0.11]
> >>>>>> [OS: RHEL 5.5]
> >>>>>>
> >>>>>> Hi all,
> >>>>>>
> >>>>>> We are seeing some odd behaviour with CouchDb not releasing
files
> >> after
> >>>>> it
> >>>>>> has compacted them meaning we are seeing disk space continue
to
> >>>> increase
> >>>>>> until the service is restarted even though we have regular
> >> compaction /
> >>>>>> cleanup.
> >>>>>>
> >>>>>> Typical scenario : File system alert for disk space ..
> >>>>>>
> >>>>>> df says 5.5.GB used ..
> >>>>>>
> >>>>>> df -h | grep -P 'Filesystem|db'
> >>>>>>
> >>>>>> Filesystem            Size  Used Avail Use% Mounted on
> >>>>>>
> >>>>>>                     8.0G  5.5G  2.2G  72% /var/lib/db
> >>>>>>
> >>>>>>
> >>>>>> .. but the files on the disk (and in Futon) say only 793MB is
being
> >>>> used
> >>>>> ..
> >>>>>>
> >>>>>>
> >>>>>> du -sh /var/lib/db/*
> >>>>>>
> >>>>>> 793M     /var/lib/db/couchdb
> >>>>>>
> >>>>>>
> >>>>>> .. running lsof shows the files marked as deleted but still
there
> >> (I'm
> >>>>>> assuming beam still has some kind of handle still open to them)
..
> >>>>>>
> >>>>>>
> >>>>>> lsof | grep -P 'COMMAND|/var/lib/db/couchdb/'
> >>>>>>
> >>>>>> COMMAND     PID      USER   FD      TYPE             DEVICE
> >> SIZE
> >>>>>> NODE NAME
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   12u      REG             253,10
> >> 4183
> >>>>>> 1210374
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.active_context_design/8efe9584a944f4b24b97f134f541d80f.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   16u      REG             253,10
> >> 612039080
> >>>>>> 1204227 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   20u      REG             253,10
> >> 180699242
> >>>>>> 1204237 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   21u      REG             253,10
> >> 3133540
> >>>>>> 2023429 /var/lib/db/couchdb/thesaurus.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   25u      REG             253,10
> >> 71422052
> >>>>>> 2023428 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   26u      REG             253,10
> >> 71372900
> >>>>>> 2056193 /var/lib/db/couchdb/active_context_schedule.couch
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   28u      REG             253,10
> >> 621252717
> >>>>>> 1204238 /var/lib/db/couchdb/active_context.couch
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   29u      REG             253,10
> >> 1740903
> >>>>>> 90113 /var/lib/db/couchdb/mapping_cache.couch
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   30u      REG             253,10
> >> 3133540
> >>>>>> 1204253 /var/lib/db/couchdb/thesaurus.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   31u      REG             253,10
> >> 2318439
> >>>>>> 1204240 /var/lib/db/couchdb/mappings.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   32u      REG             253,10
> >> 983150
> >>>>>> 2004994
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.mappings_design/f9964c50b95c167c8ac3d8d3b4c76a4b.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   33u      REG             253,10
> >> 3133540
> >>>>>> 2056194 /var/lib/db/couchdb/thesaurus.couch
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   34u      REG             253,10
> >> 70742116
> >>>>>> 1204231 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   44u      REG             253,10
> >> 1740903
> >>>>>> 2023427 /var/lib/db/couchdb/mapping_cache.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   45u      REG             253,10
> >> 65396836
> >>>>>> 1994756 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   47u      REG             253,10
> >> 71229540
> >>>>>> 1204243 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   48u      REG             253,10
> >> 240254078
> >>>>>>  1204226 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   49u      REG             253,10
> >> 2232423
> >>>>>> 1204241 /var/lib/db/couchdb/mappings.couch
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   51u      REG             253,10
> >> 96903353
> >>>>>> 1210371
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.active_context_design/b406f7bb6d01b6d50324f14cde588324.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   52u      REG             253,10
> >> 1192034
> >>>>>> 1249282
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.mapping_cache_design/8bbf80a6e1ca8f2c71ebc90c730e7190.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   53u      REG             253,10
> >> 1622135
> >>>>>> 2004993
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.mappings_design/1ff69004b575837aae9d4147162197d4.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   54u      REG             253,10
> >> 4172
> >>>>>> 1208327
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.thesaurus_design/73fe79b20ff06e341257fa78231ca87e.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   55u      REG             253,10
> >> 13496483
> >>>>>> 1208325
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.thesaurus_design/fcc08d6e41c54c0d470c5984ea9eb6e3.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   56u      REG             253,10
> >> 12959902
> >>>>>> 1208326
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.thesaurus_design/c06195da19f34ced37fa1ab91e663c73.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   57u      REG             253,10
> >> 70254692
> >>>>>> 1204236 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   58u      REG             253,10
> >> 581730
> >>>>>> 1210373
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>
> /var/lib/db/couchdb/.active_context_schedule_design/c64c047dcff74ea2122356efb1042759.view
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   67u      REG             253,10
> >> 1818727
> >>>>>> 1204247 /var/lib/db/couchdb/mapping_cache.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   78u      REG             253,10
> >> 609905146
> >>>>>> 1204234 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   80u      REG             253,10
> >> 545919085
> >>>>>> 1994753 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   81u      REG             253,10
> >> 71032932
> >>>>>> 1204249 /var/lib/db/couchdb/active_context_schedule.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   84u      REG             253,10
> >> 548866111
> >>>>>> 1204239 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   85u      REG             253,10
> >> 564612402
> >>>>>> 1204233 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb   87u      REG             253,10
> >> 615996179
> >>>>>> 1204228 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>> beam.smp  21352   couchdb  102u      REG             253,10
> >> 561111149
> >>>>>> 2023425 /var/lib/db/couchdb/active_context.couch (deleted)
> >>>>>>
> >>>>>>
> >>>>>> Has anyone seen this behaviour before or knows of a way around
this
> >> ?
> >>>>>> Currently we have to restart the couchdb service in order to
restore
> >>>> the
> >>>>>> disk space.
> >>>>>>
> >>>>>> Any help/advice is much appreciated.
> >>>>>>
> >>>>>> Regards
> >>>>>>
> >>>>>> Stephen
> >>>>>>
> >>>>>
> >>>>
> >>>
> >>
>
>

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