Hi, After disabling the CDN on my forum, I ran rake posts:rebake. It failed after a few dozen thousand rebake. Searching for on of the error messages (“PQsocket() can’t get socket descriptor”) led me to Rake:rebake crashes with errors: PG::ConnectionBad: PQsocket - #8 by j127 where adding swap solved the issue. I’m not sure the issue is the same tho, but I tried it, and rebaking still fail. It’s possible that it fails after more rebaking than before after adding swap but I didn’t write down how many rebakes it failed the first times. What happens: It starts rebaking, and crashes after about 200000 posts out of 1.6 million.root@Unicyclist-app:/var/www/discourse# rake posts:rebake Rebaking post markdown for 'default' 202930 / 1634878 ( 12.4%) Failed to rebake (topic_id: 196639, post_id: 1470519) PQconsumeInput() server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. After this message, this error is instantly shown for hundreds of subsequent posts : 202931 / 1634878 ( 12.4%) Failed to rebake (topic_id: 196638, post_id: 1470518) PQsocket() can't get socket descriptor /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `async_exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in `perform_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in `block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1017:in `block in with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/concurrency/null_lock.rb:9:in `synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:986:in `with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in `block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/notifications/instrumenter.rb:58:in `instrument' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1137:in `log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in `raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in `internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:547:in `internal_exec_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:693:in `select' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:73:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/query_cache.rb:262:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/querying.rb:68:in `_query_by_sql' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/querying.rb:53:in `block in find_by_sql' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_handling.rb:312:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/querying.rb:52:in `find_by_sql' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/statement_cache.rb:152:in `execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/core.rb:454:in `block in cached_find_by' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_handling.rb:312:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/core.rb:442:in `cached_find_by' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/core.rb:327:in `find_by' /var/www/discourse/lib/pretty_text/helpers.rb:20:in `avatar_template' /var/www/discourse/lib/pretty_text.rb:255:in `call' /var/www/discourse/lib/pretty_text.rb:255:in `eval' /var/www/discourse/lib/pretty_text.rb:255:in `block in markdown' /var/www/discourse/lib/pretty_text.rb:695:in `block in protect' /var/www/discourse/lib/pretty_text.rb:695:in `synchronize' /var/www/discourse/lib/pretty_text.rb:695:in `protect' /var/www/discourse/lib/pretty_text.rb:192:in `markdown' /var/www/discourse/lib/pretty_text.rb:318:in `cook' /var/www/discourse/app/models/post_analyzer.rb:30:in `cook' /var/www/discourse/app/models/post.rb:359:in `cook' /var/www/discourse/app/models/post.rb:836:in `rebake!' /var/www/discourse/lib/tasks/posts.rake:145:in `rebake_post' /var/www/discourse/lib/tasks/posts.rake:132:in `block (2 levels) in rebake_posts' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation/delegation.rb:101:in `each' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation/delegation.rb:101:in `each' /var/www/discourse/lib/tasks/posts.rake:131:in `block in rebake_posts' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/lib/tasks/posts.rake:126:in `rebake_posts' /var/www/discourse/lib/tasks/posts.rake:111:in `block in rebake_posts_all_sites' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:36:in `each_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in `each_connection' /var/www/discourse/lib/tasks/posts.rake:111:in `rebake_posts_all_sites' /var/www/discourse/lib/tasks/posts.rake:7:in `block in ' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:281:in `block in execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:281:in `each' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:281:in `execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:219:in `block in invoke_with_call_chain' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:199:in `synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:199:in `invoke_with_call_chain' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/task.rb:188:in `invoke' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:188:in `invoke_task' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:138:in `block (2 levels) in top_level' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:138:in `each' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:138:in `block in top_level' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:147:in `run_with_threads' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:132:in `top_level' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:83:in `block in run' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:214:in `standard_exception_handling' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.3.1/lib/rake/application.rb:80:in `run' bin/rake:13:in ` ' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli/exec.rb:59:in `load' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli/exec.rb:59:in `kernel_load' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli/exec.rb:23:in `run' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli.rb:452:in `exec' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/vendor/thor/lib/thor/command.rb:28:in `run' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/vendor/thor/lib/thor.rb:538:in `dispatch' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli.rb:35:in `dispatch' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/vendor/thor/lib/thor/base.rb:584:in `start' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/cli.rb:29:in `start' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/exe/bundle:28:in `block in ' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/exe/bundle:20:in ` ' /usr/local/bin/bundle:25:in `load' /usr/local/bin/bundle:25:in ` ' Until it ends with this multiple times:Caused by: ActiveRecord::ConnectionNotEstablished: PQsocket() can't get socket descriptor (ActiveRecord::ConnectionNotEstablished) /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `async_exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in `perform_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in `block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1017:in `block in with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/concurrency/null_lock.rb:9:in `synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:986:in `with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in `block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/notifications/instrumenter.rb:58:in `instrument' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1137:in `log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in `raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in `internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:547:in `internal_exec_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:693:in `select' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:73:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/query_cache.rb:262:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/querying.rb:68:in `_query_by_sql' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1459:in `block (2 levels) in exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_handling.rb:312:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1458:in `block in exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1480:in `skip_query_cache_if_necessary' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1442:in `exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1420:in `block in exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1480:in `skip_query_cache_if_necessary' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1414:in `exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/goldiloader-6.0.0/lib/goldiloader/active_record_patches.rb:40:in `exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1191:in `load' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:353:in `records' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation/delegation.rb:101:in `each' /var/www/discourse/lib/tasks/posts.rake:131:in `block in rebake_posts' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/lib/tasks/posts.rake:126:in `rebake_posts' /var/www/discourse/lib/tasks/posts.rake:111:in `block in rebake_posts_all_sites' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:36:in `each_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in `each_connection' /var/www/discourse/lib/tasks/posts.rake:111:in `rebake_posts_all_sites' /var/www/discourse/lib/tasks/posts.rake:7:in `block in ' /usr/local/bin/bundle:25:in `load' /usr/local/bin/bundle:25:in ` ' Caused by: PG::ConnectionBad: PQsocket() can't get socket descriptor (PG::ConnectionBad) /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-4.0.1/lib/patches/db/pg/alias_method.rb:109:in `async_exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/postgresql/database_statements.rb:167:in `perform_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:556:in `block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1017:in `block in with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/concurrency/null_lock.rb:9:in `synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:986:in `with_raw_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:555:in `block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/notifications/instrumenter.rb:58:in `instrument' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:1137:in `log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:554:in `raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:591:in `internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:547:in `internal_exec_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:693:in `select' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:73:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/query_cache.rb:262:in `select_all' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/querying.rb:68:in `_query_by_sql' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1459:in `block (2 levels) in exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:416:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/connection_handling.rb:312:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1458:in `block in exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1480:in `skip_query_cache_if_necessary' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1442:in `exec_main_query' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1420:in `block in exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1480:in `skip_query_cache_if_necessary' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1414:in `exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/goldiloader-6.0.0/lib/goldiloader/active_record_patches.rb:40:in `exec_queries' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:1191:in `load' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation.rb:353:in `records' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-8.0.4/lib/active_record/relation/delegation.rb:101:in `each' /var/www/discourse/lib/tasks/posts.rake:131:in `block in rebake_posts' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/core_ext/range/each.rb:14:in `step' /var/www/discourse/lib/tasks/posts.rake:126:in `rebake_posts' /var/www/discourse/lib/tasks/posts.rake:111:in `block in rebake_posts_all_sites' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:36:in `each_connection' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in `each_connection' /var/www/discourse/lib/tasks/posts.rake:111:in `rebake_posts_all_sites' /var/www/discourse/lib/tasks/posts.rake:7:in `block in ' /usr/local/bin/bundle:25:in `load' /usr/local/bin/bundle:25:in ` ' Tasks: TOP => posts:rebake (See full trace by running task with --trace) root@Unicyclist-app:/var/www/discourse# Here’s the output of free -h during the rebake (the values are roughly the same at any time during the rebake): total used free shared buff/cache available Mem: 7.6Gi 4.6Gi 231Mi 2.1Gi 2.8Gi 709Mi Swap: 2.0Gi 1.8Gi 194Mi I also have a lot of free space (I didn’t the first times, but freed space just in case, and it didn’t change anything). I have rebaked all posts on this forum a few times over the last years and I never faced any issues. The forum hasn’t grown much, the server’s specs are the same as before.

I increased the swap size from 2 to 4 GB, and the rebake worked. So, I guess it was about memory, though I am a bit surprised by how much it asks (8 GB RAM + 4 GB swap), especially since older rebakes didn’t have any issues with no swap and the same amount of RAM. What should I do if I want to monitor RAM usage and check for any issues? What metric should matter to estimate the memory requirements? Page views per day (5000-8000 + bot spikes once or twice a month)? Database size (23 GB)? :person_shrugging: :face_with_raised_eyebrow:

I’m still looking for help on this :face_with_tongue:

Memory usage is much greater during a rebuild than during normal operation. It seems that rebaking, similarly, makes a great demand. If so, any kind of regular monitoring wouldn’t add much value: the monitoring would be needed during those peaks, which fortunately happen when the admin takes some specific action. When I was running on smaller, more marginal machine configuration, I would have a second terminal window open, ssh’d into my server and running vmstat 5 which gives a record of memory usage as it ebbs and flows. Watch the swpd column and compare against your configured swap space. Commonly the failure will happen suddenly, not gradually, so even looking at short term trends is not much help. If you have the disk space, there’s no harm at all in having lots of swap - half as much as RAM, or even as much as RAM. It’s there in this case to cope with peaks. You don’t want to see swapping/paging activity during normal use. Again, one can use vmstat 5 5 to get a short-term picture of paging activity (in the si and so columns) Here’s an example: # vmstat 5 5 procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 3 0 1392140 61200 11632 76432 41 32 117 93 0 1 2 1 97 0 0 1 1 1467220 63416 324 67284 8786 20499 13178 20567 2539 8924 77 13 0 10 0 0 2 1593340 57916 1096 53832 24262 46868 29986 46889 5377 18534 44 22 0 34 0 4 0 1155632 120680 2772 86280 39111 35424 54768 37824 6987 25174 38 27 0 35 0 3 0 1102988 74096 2852 85276 11261 246 12610 271 1879 6365 86 6 0 8 0 You see that that swpd column peaked at over 1.5G, versus my 2.0G configured. You see that swapout (so) activity peaked in the same 5 second window, and swapin (si) peaked in the next window. (Edit: I can see I had 2.0G swap configured because I’d previous run free: # free total used free shared buff/cache available Mem: 1009140 696504 78544 51784 234092 118436 Swap: 2097144 154628 1942516 we also see I was at the time managing to run discourse with only 1G RAM.)

[image] Ed_S: If you have the disk space, there’s no harm at all in having lots of swap - half as much as RAM, or even as much as RAM Interesting. I’ve been short on disk space for a while. I’m currently trying to rescale to other plans (I’ll create a topic about it) and see how performances compare, but instead of doing this, you think it would be a better idea – on the paper, at least – to keep my plan, move my backups to a cheap additional volume[1], and add several GB of swap? Well I need to see if there’s that much difference between adding a volume or changing my plan to another one that also offers more disk space) ↩︎

That’s a possible tradeoff. One of the first things I did was limit the number (and adjust the frequency) of backups. I haven’t yet moved to block storage for backups, or uploads, but that might be a win, if it extends the useful life of a limited-RAM configuration. (Another thing I did, towards the end of my tenure in the smallest config machines, was to temporarily rescale to a larger RAM instance just for the time it takes to do an upgrade, and then rescale back. It only cost pennies, even though the larger instance might be twice the monthly cost. But it does take a little downtime, and a little time and care. And it requires that your provider has a larger machine with the same disk capacity - upscaling to a config with larger disk is usually a one-way street.)

[image] Ed_S: And it requires that your provider has a larger machine with the same disk capacity My providers allows upscaling while keeping the same disk space, which allows unscaling if needed :slight_smile:

Rebake failing: how to diagnose and fix?

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Canapin (Coin-coin le Canapin) December 14, 2025, 2:51pm 7

My providers allows upscaling while keeping the same disk space, which allows unscaling if needed

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Rebake failing: how to diagnose and fix?

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