Similar problem here (in an almost new community), in a Docker-based installation, sidekiq is restarted frequently (in previous discourse version and latest one, v1.9.0.beta2 +83), here the log/backtrace:
Message
Sidekiq is consuming too much memory (using: 518.18M) for 'community.aseprite.org', restarting
Backtrace
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/logster-1.2.7/lib/logster/logger.rb:93:in `add_with_opts'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/logster-1.2.7/lib/logster/logger.rb:50:in `add'
/usr/local/lib/ruby/2.4.0/logger.rb:534:in `warn'
config/unicorn.conf.rb:167:in `check_sidekiq_heartbeat'
config/unicorn.conf.rb:190:in `master_sleep'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/unicorn-5.3.0/lib/unicorn/http_server.rb:294:in `join'
/var/www/discourse/vendor/bundle/ruby/2.4.0/gems/unicorn-5.3.0/bin/unicorn:126:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.4.0/bin/unicorn:22:in `load'
/var/www/discourse/vendor/bundle/ruby/2.4.0/bin/unicorn:22:in `<main>'
Env
hostname community-1-app
process_id 1500
application_version 48fb19d9e483bc118c007eef1a997d5126e3adfc
I have 9 similar errors since 17 Jun 2:59 pm