{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-647922203", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 647922203, "node_id": "MDEyOklzc3VlQ29tbWVudDY0NzkyMjIwMw==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T05:44:58Z", "updated_at": "2021-01-05T08:22:43Z", "author_association": "CONTRIBUTOR", "body": "I'm seeing the problem on database page. Index page and table page runs quite fast.\r\n\r\n- Tables have <10 columns (`id`, `url`, `title`, `body_html`, `date`, `author`, `meta` (for keeping unstructured json)). I've added index on `date` columns (using `sqlite-utils`) in addition to the index present on `id` columns. \r\n- All tables have FTS enabled on `text` and `varchar` columns (`title`, `body_html` etc) to speed up searching.\r\n- There are couple of tables related with foreign keys (think a thread in a forum and posts in that thread, related with `thread_id`)\r\n\r\n", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-647923666", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 647923666, "node_id": "MDEyOklzc3VlQ29tbWVudDY0NzkyMzY2Ng==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T05:49:31Z", "updated_at": "2020-06-23T05:49:31Z", "author_association": "CONTRIBUTOR", "body": "I think I should mention that having FTS on all tables mean I have 5 visible, 25 hidden (FTS) tables displayed on database page.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-647925594", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 647925594, "node_id": "MDEyOklzc3VlQ29tbWVudDY0NzkyNTU5NA==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T05:55:21Z", "updated_at": "2020-06-23T06:28:29Z", "author_association": "CONTRIBUTOR", "body": "Hmm, not seeing the problem now.  \r\nI've removed the commented out sections in `database.py` and restarted the process. Database page now loads in <250ms.\r\n\r\nI have couple of workers that check some pages regularly and scrape new content and save to the DB. Could it be that datasette tries to recount tables every time database size changes? Normally it keeps a count cache, but as DB gets updated so often (new content every 5 min or so) it's practically recounting every time I go to the database page?\r\n\r\nEDIT: \r\nIt turns out it doesn't hold cache with mutable databases.\r\n\r\nI'll update the issue with more findings and a better way to reproduce the problem if I encounter it again.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-647935300", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 647935300, "node_id": "MDEyOklzc3VlQ29tbWVudDY0NzkzNTMwMA==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T06:23:01Z", "updated_at": "2020-06-23T06:23:01Z", "author_association": "CONTRIBUTOR", "body": "> You said \"200k+, 50+ rows in a couple of tables\" - does that mean 50+ columns? I'll try with larger numbers of columns and see what difference that makes.\r\n\r\nAh that was a typo, I meant 50k.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-647936117", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 647936117, "node_id": "MDEyOklzc3VlQ29tbWVudDY0NzkzNjExNw==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T06:25:17Z", "updated_at": "2020-06-23T06:25:17Z", "author_association": "CONTRIBUTOR", "body": "> \r\n> \r\n> ```\r\n> sqlite-generate many-cols.db --tables 2 --rows 200000 --columns 50\r\n> ```\r\n> \r\n> Looks like that will take 35 minutes to run (it's not a particularly fast tool).\r\n\r\nTry chunking write operations into batches every 1000 records or so.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}
{"html_url": "https://github.com/simonw/datasette/issues/859#issuecomment-648232645", "issue_url": "https://api.github.com/repos/simonw/datasette/issues/859", "id": 648232645, "node_id": "MDEyOklzc3VlQ29tbWVudDY0ODIzMjY0NQ==", "user": {"value": 3243482, "label": "abdusco"}, "created_at": "2020-06-23T15:19:53Z", "updated_at": "2020-06-23T15:19:53Z", "author_association": "CONTRIBUTOR", "body": "The issue seems to appear sporadically, like when I return to database page after a while, during which some records have been added to the database.\r\n\r\nI've just visited database, page first visit took ~10s, consecutive visits took 0.3s.", "reactions": "{\"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "issue": {"value": 642572841, "label": "Database page loads too slowly with many large tables (due to table counts)"}, "performed_via_github_app": null}