Robert, This is an old bug that compactor has no matter what Erlang version was used. I hit it during work on munin-couchdb: https://github.com/gws/munin-plugin-couchdb/#open-files
Graph shows what will happen if you'll compact a lot of databases continuously for some time. I recall how I with Davis and Adam borrow into the code looking for the reason where we don't close the file, but it wasn't easy to find the cause. -- ,,,^..^,,, On Mon, Sep 5, 2016 at 12:32 PM, Robert Samuel Newson <rnew...@apache.org> wrote: > Hi Nigel, > > Thanks for the report. We've seen this issue with R14 series of erlang, where > calling file:close/1 doesn't always close the file descriptor, so I suggest > trying something newer (I can vouch for 17.5 from extensive production > experience). > > Can you confirm if this is _every_ compaction or only a subset? If the > latter, can you estimate what percentage? > > You say "at 50%" so I'm inferring you've enabled the compaction daemon, but > please confirm. > > B. > > >> On 5 Sep 2016, at 09:53, Nigel Phippen <nigel.phip...@s-a-m.com> wrote: >> >> Hello all, >> >> This is my first post so please bear with me. >> >> I am running CouchDB 1.6.1 (with Erlang is R14B-04.3.el6) on CentOS 6.7. >> >> I have multiple databases on our single server, with each database having >> around a dozen views. Thousands of new documents are added to the databases >> throughout the day but there are no document deletions (unless done for >> administrative purposes). Many documents are regularly updated, possibly >> hundreds of times, leading to documents having multiple versions. Database >> and view compaction is set to occur at 50%. >> >> The problem I am seeing is that, over the course of several days, disk space >> is being consumed in the volume housing the CouchDB databases. Upon >> investigation, I can see that CouchDB (or possibly some other process) >> appears to have moved files to a '/usr/local/var/lib/couchdb/.delete' >> folder, ready for deletion, but has not actually fully deleted the files. >> >> ------------------------------------------------------- >> # /usr/sbin/lsof +aL1 >> >> COMMAND PID USER FD TYPE DEVICE SIZE/OFF NLINK NODE NAME >> beam.smp 21784 couchdb 19u REG 253,1 12747263 0 157740 >> /usr/local/var/lib/couchdb/.delete/e3a4de3acbf62f6fe6621c0d584adcee (deleted) >> beam.smp 21784 couchdb 41u REG 253,1 13292013 0 157757 >> /usr/local/var/lib/couchdb/.delete/7202d47094b51d60d9a4cc39f448f2c8 (deleted) >> beam.smp 21784 couchdb 61u REG 253,1 12317183 0 158688 >> /usr/local/var/lib/couchdb/.delete/518f417167c31921925fe66b11ca85d2 (deleted) >> beam.smp 21784 couchdb 64u REG 253,1 8471022 0 158669 >> /usr/local/var/lib/couchdb/.delete/bea3b216976a62912ee79034fc374314 (deleted) >> beam.smp 21784 couchdb 162u REG 253,1 9097692 0 139109 >> /usr/local/var/lib/couchdb/.delete/48f75f12d680afbd7ec1c0c3c01ccb99 (deleted) >> beam.smp 21784 couchdb 168u REG 253,1 8901102 0 155061 >> /usr/local/var/lib/couchdb/.delete/e5692819be8422a83f675daa1267cc3a (deleted) >> beam.smp 21784 couchdb 187u REG 253,1 13046253 0 157756 >> /usr/local/var/lib/couchdb/.delete/8f2cb8517ab7659cc04091cc9db735e8 (deleted) >> ------------------------------------------------------- >> >> Over several days, there can be dozens of these files, consuming GBytes of >> space. Left unchecked, all disk space in the /usr volume will be consumed, >> causing the system to fail. The only way to clear out the files for good is >> to restart the CouchDB service. >> >> This appears to be the same problem as reported in >> https://issues.apache.org/jira/browse/COUCHDB-926 over five years ago. >> >> I'd appreciate any assistance is resolving this issue. Please let me know if >> additional information is required. >> >> Many thanks, >> >> Nigel. >> --------------------------------------------------------------------------------------- >> This email has been scanned for email related threats and delivered safely >> by Mimecast. >> For more information please visit http://www.mimecast.com >> --------------------------------------------------------------------------------------- >> >
