Verbose output?


How do I get verbose output with Previewgenerator?

adding -vvv to your command

thanks I will try it.

Hi verbose output works, but it is freakingly slow :frowning: like half a min for a 12mp image :frowning:

configuration description needed.

  • harware
  • dbase ?
  • os
  • php version

Quad i7 3.5 ghz

Debian Testing x64
mysql Ver 15.1 Distrib 10.1.34-MariaDB
php 7.1

See these numbers please

2018-08-13T23:22:55+00:00 Generating previews for
2018-08-13T23:22:59+00:00 Generating previews for
2018-08-13T23:25:33+00:00 Generating previews for
2018-08-13T23:28:19+00:00 Generating previews for
2018-08-13T23:31:32+00:00 Generating previews for
2018-08-13T23:32:35+00:00 Generating previews for

do you haved imagick installed ?

well, I think I had issues with magick so I uninstalled it before. I installed it after you mentioned it but I cant seem to go much from here

sudo -u www-data php occ preview:generate-all -vvv
2018-08-14T21:05:12+00:00 Scanning folder /admin/files
2018-08-14T21:05:12+00:00 Scanning folder /admin/files/Documents
free(): invalid next size (normal)
Magick: abort due to signal 6 (SIGABRT) “Abort”…

I just benchmark my system:

23725701 rawtest.CR2 preview take around 4 seconds


  • AMD A8-6500 APU with Radeon™ HD Graphics, 4 cores
  • 8 GB ram
  • Linux 4.9.0-7-amd64 on x86_64
  • OS disk SSD: TS32GSSD370S
  • RAID6 (Dual Distributed Parity) Used in LVM VG based on 6xST4000NE0025-2EW 12TB
  • nextcloud 13.0.5 / php7.0 / mariaDB 10.2

could you experience some i/o queue ? What is your hardware for controller and hdd/sdd ??