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 <[email protected]> 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] <[email protected]> wrote: > >> Is this an issue with the OS or with Couch/Beam itself ? >> >> On 10 September 2010 16:57, Juan Jose Comellas <[email protected]> >> 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] <[email protected]> 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 >> > > >> > >> >
