Hi. I’ve upgraded to the latest version of discourse. I’ve changed the CDN url and rebake the posts. After that, I have lots of processes running one after the other with this command: convert jpeg:/var/www/discourse/tmp/download_cache/002ca318720dd3e60e31eddddf2c12fca64df1d3.jpg[0] -auto-orient -gravity center -background transparent -thumbnail 1035x502^ -extent 1035x502 -interpolate catrom -unsharp 2x0.5+0.7+0 -interlace none -quality 98 -profile /var/www/discourse/vendor/data/RT_sRGB.icm jpeg:/tmp/discourse-thumbnail20181105-5725-s2szhw.jpeg any thoughts?

should stop in a few hours , we had to re-download gravatars.

Hi! I’ve the same problem. I searched and found this post a few days ago, so according to your feedback @sam we decided to wait before doing any action in the forum, but after 4 days the convert process is killing our machine and pulling down the forum (it starts going slower and then starts throwing 502 for any request). This is the top at this moment: %CPU %MEM TIME+ COMMAND 51.5 3.0 0:07.73 ruby 27.9 7.2 3:42.61 postmaster 14.3 7.4 0:09.51 convert 13.6 7.3 1:52.68 postmaster 13.0 3.6 0:02.20 convert 11.3 3.8 0:02.41 convert 10.3 3.9 0:02.20 convert 8.3 6.3 0:17.23 convert 8.3 9.5 0:09.11 convert 8.3 1.0 0:10.39 convert 8.3 3.7 0:01.96 convert 7.3 0.7 0:09.91 convert 7.0 7.1 0:01.69 convert 4.0 3.3 0:05.59 convert 1.3 0.0 0:53.90 kswapd0 0.7 0.0 0:00.40 kworker/u4:1ert 1.3 0.0 0:53.90 kswapd0 0.7 0.0 0:00.40 kworker/u4:1 Our setup is a one-click DigitalOcean image and the problem started last Friday 2019-02-22 10:00 after upgrading the forum to the last version from 2.2.0beta1 +20 to 2.3.0.beta2. Taken actions: Waiting for the process to end Clearing old containers + images and rebuilding Restarting 3-4 times the machine Crying Any idea? Thank you very much and sorry for bothering you.

Does your forum have a lot of images?

Thanks for answering. “A lot” is relative, but I think yes, it have some images-based threads by the community. I supposed that’s the reason but it looks strange to me after 4 days hitting 100% CPU and I supposed that this kind of background jobs are normally running in queues or someting similar to control it. I just thinking loud and speculating, I don’t know (yet) how Discourse internals works.

Maybe try halving the “rebake old posts count” to 40 and see how you are doing? Have a look at /sidekiq are you backed up with tons of jobs?

Thanks for answering @sam. Changing rebake to 40 helps a little bit, now throws less 502 but still failing after 20-30 minutes from the last server restart. Regarding the jobs, yes, there are a lot of jobs and are decreasing very slowly or just stuck in the same number of pending tasks. [47] (it’s in spanish, if someone needs a translation just ping me and I’ll update this message with the translation) This is the top at this moment after the last change & restarting the server 20 min ago. %CPU %MEM TIME+ COMMAND 43.9 16.5 0:11.38 convert 20.3 9.0 0:11.19 convert 19.9 4.1 0:12.63 convert 13.3 7.5 0:11.52 ruby 8.0 7.6 0:11.69 ruby 7.0 5.6 0:01.75 postmaster 6.3 7.6 0:10.88 ruby 2.7 3.4 0:14.12 redis-server 2.7 5.0 0:01.11 postmaster 1.0 3.8 0:00.80 postmaster 0.7 4.8 0:13.04 ruby 0.7 8.1 0:06.26 ruby 0.3 0.0 0:01.88 rcu_sched 0.3 0.3 0:02.34 dockerd 0.3 0.1 0:05.23 nginx 0.3 0.2 0:00.77 postmaster 0.3 0.2 0:00.01 jpegoptim 0.0 0.0 0:01.19 init 0.0 0.0 0:00.00 kthreadd 0.0 0.0 0:01.08 ksoftirq

Change “rebake old posts count” to 10 or lower to let sidekiq clear the queue and then slowly increase it.

This is odd as the convert process runs at a very low priority. I had this setting cranked way up and had our 12 core server maxed out on CPU for close to two weeks without any noticeable slowdown. Is your server short on RAM, or do you have a very slow hard disk?

It’s a DO droplet with 4 GB Memory / 60 GB Disk / Ubuntu Discourse on 14.04 This is the performance of the last 24h. [09] (those breakdowns are me restarting the server or just the site down when I was not able to restart it) More performance screenshots with details 📈 [48] [14] [38] I would like to mention we’ve never had performance issues (memory and disk) until now with the convert process. [image] zogstrip: Change “ rebake old posts count ” to 10 or lower to let sidekiq clear the queue and then slowly increase it. I followed your suggestion and the performance is better (as expected, fewer things to do), but the queue still increasing instead of going to less. Thanks everyone for your time.

[image] skozz: but the queue still increasing instead of going to less. What’s in the queue? Have you tried setting it to 0 to let it cool down?

"convert" process eating CPU

Product Support Self-hosting

sam (Sam Saffron) February 27, 2019, 12:43am 13

And at 1 everything is fine?

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"convert" process eating CPU

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