It’s a possibility that the data structure holding free space is overflowing, if it can’t deal with 1.8Tb of free space.
I would suggest that you set a quota on the ZFS filesystem to bring the free space down to something of the order of a couple of Gb, and see if that resolves it. If it does, it gives you something to look at/for, and is easy/quick/non-disruptive to set and unset. If that does sort things out, then it’s a case of checking how postfix was built - you may find it was built using a 32 bit compiler - despite the system being 64 bit capable, or not using the right flags during build. https://illumos.org/man/5/lfcompile64 > On 1 Jun 2020, at 12:00, Jaco Lesch <ja...@saix.net> wrote: > > > > On 6/1/20 11:16, Gabriele Bulfon wrote: >> Hi Jaco, thanks a lot. Here is the output: >> >> Sonicle XStreamOS (powered by illumos) SunOS 5.11 xs_154 June 2016 >> sonicle@cloudserver:~$ zpool list >> NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT >> data 9.81T 6.80T 3.02T - 58% 69% 1.00x ONLINE - >> >> Consider that this is an illumos zone, which has it's BE inside data, so the >> root FS is inside the data pool: >> >> sonicle@cloudserver:~$ zfs list >> NAME USED AVAIL REFER MOUNTPOINT >> data 4.53T 1.80T 7.64G /data >> data/cloud 4.48T 1.80T 32.0K /data/cloud >> data/cloud/server 227G 1.80T 32.0K /data/cloud/server >> data/cloud/server/ROOT 227G 1.80T 32.0K legacy >> data/cloud/server/ROOT/zbe 227G 1.80T 187G legacy >> data/cloud/server/ROOT/zbe-1 2.84M 1.80T 110G legacy >> data/cloud/server/ROOT/zbe-backup-1 3.70M 1.80T 65.2G legacy >> data/cloud/server/ROOT/zbe-backup-2 3.40M 1.80T 101G legacy >> >> Gabriele >> >> >> >> >> >> Sonicle S.r.l. : http://www.sonicle.com >> Music: http://www.gabrielebulfon.com >> Quantum Mechanics : http://www.cdbaby.com/cd/gabrielebulfon >> >> >> >> Da: Jaco Lesch <ja...@saix.net> >> A: Gabriele Bulfon <gbul...@sonicle.com>postfix-users@postfix.org >> Data: 1 giugno 2020 10.31.13 CEST >> Oggetto: Re: 452 4.3.1 Insufficient system storage >> >> >> >> >> On 6/1/20 09:28, Gabriele Bulfon wrote: >> Also queue_minfree is 0, running postconf, so no check should be performed. >> Right? >> >> >> >> Sonicle S.r.l. : http://www.sonicle.com >> Music: http://www.gabrielebulfon.com >> Quantum Mechanics : http://www.cdbaby.com/cd/gabrielebulfon >> >> >> >> ---------------------------------------------------------------------------------- >> >> Da: Matus UHLAR - fantomas <uh...@fantomas.sk> >> A: postfix-users@postfix.org >> Data: 29 maggio 2020 17.49.10 CEST >> Oggetto: Re: 452 4.3.1 Insufficient system storage >> >> On 29.05.20 15:42, Gabriele Bulfon wrote: >> >This in mail.log: >> >May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] >> >connect from sender-host[*.*.*.*] >> >May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] >> >Anonymous TLS connection established from sender-host[*.*.*.*]: TLSv1.2 >> >with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits) >> >May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 197553 mail.info] >> >NOQUEUE: reject: MAIL from sender-host[*.*.*.*]: 452 4.3.1 Insufficient >> >system storage; proto=ESMTP helo= >> >May 28 20:09:45 cloudserver postfix/smtpd[21079]: [ID 947731 mail.warning] >> >warning: not enough free space in mail queue: 38384640 bytes >> > >> >This last warning looks quite uncomprehensible, message size limit is >> >50000000, and sure 38384640 is less than 1.5*msl, so what's the problem? >> >> _that_ is apparently the problem. >> >> you have 38384640 B (~38MB) of free space in queue, but message maximum size >> is 50MB, so you don't have enough of free space for maximum message size, >> not even for 1.5*maximum required by default: >> >> http://www.postfix.org/postconf.5.html#queue_minfree >> >> >> -- >> Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ >> Warning: I wish NOT to receive e-mail advertising to this address. >> Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. >> The 3 biggets disasters: Hiroshima 45, Tschernobyl 86, Windows 95 >> >> >> Gabriele >> >> What does the output of "zpool list" look like? >> >> Regards >> >> -- >> --- >> Jaco Lesch >> SAIX HLS >> Email: >> ja...@saix.net > Gabriele > > Have you possibly considered running the Postfix mail queues on a separate > ZFS filestsystem? That is what we have done in our environment for Postfix on > Solaris 11, also assigned a ZFS quota to the filesystem. > > This is fairly straight forward with the "zfs create" command. > > Just a thought. > > Regards > > -- > --- > Jaco Lesch > SAIX HLS > Email: > ja...@saix.net
