github
html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | issue | performed_via_github_app |
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https://github.com/simonw/datasette/issues/1384#issuecomment-1066194130 | https://api.github.com/repos/simonw/datasette/issues/1384 | 1066194130 | IC_kwDOBm6k_c4_jNTS | 167160 | 2022-03-13T22:23:04Z | 2022-03-13T22:23:04Z | NONE | Ah, sorry, I didn't get what you were saying you the first time. Using _metadata_local in that way makes total sense -- I agree, refreshing metadata each cell was seeming quite excessive. Now I'm on the same page! :) | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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https://github.com/simonw/datasette/issues/1384#issuecomment-1066143991 | https://api.github.com/repos/simonw/datasette/issues/1384 | 1066143991 | IC_kwDOBm6k_c4_jBD3 | 167160 | 2022-03-13T17:13:09Z | 2022-03-13T17:13:09Z | NONE | Thanks for taking the time to reply @brandonrobertz , this is really helpful info. > See "Many small queries are efficient in sqlite" for more information on the rationale here. Also note that in the datasette-live-config reference plugin, the DB connection is cached, so that eliminated most of the performance worries we had. Ah, that's nifty! Yeah, then caching on the python side is likely a waste :) I'm new to working with sqlite so this is super good to know the many-small-queries is a common pattern > I tested on very large Datasette deployments (hundreds of DBs, millions of rows). For my reference, did you include a `render_cell` plugin calling `get_metadata` in those tests? I'm less concerned now that I know a little more about sqlite's caching, but that special situation will jump you to a few orders of magnitude above what the sqlite article describes (e.g. 200 vs 20,000 queries+metadata merges for a page displaying 100 rows of a 200 column table). It wouldn't scale with db size as much as # of visible cells being rendered on the page, although they would be identical queries I suppose so will cache well. (If you didn't test this specific situation, no worries -- I'm just trying to calibrate my intuition on this and can do my own benchmarks at some point.) > Simon talked about eventually making something like this a standard feature of Datasette Yeah, getting metadata (and static pages as well for that matter) from internal tables definitely has my vote for including as a standard feature! Its really nice to be able to distribute a single *.db with all the metadata and static pages bundled. My metadata are sufficiently complex/domain specific that it makes sense to continue on my own plugin for now, but I'll be thinking about more general parts I can spin off as possible contributions to liveconfig (if you're open to them) or other plugins in this ecosystem. | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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https://github.com/simonw/sqlite-utils/issues/408#issuecomment-1066139147 | https://api.github.com/repos/simonw/sqlite-utils/issues/408 | 1066139147 | IC_kwDOCGYnMM4_i_4L | 24938923 | 2022-03-13T16:45:00Z | 2022-03-13T16:54:09Z | NONE | @simonw Now I get this: ``` (app-root) sqlite-utils indexes global.db --table Error: near "(": syntax error (app-root) sqlite-utils --version sqlite-utils, version 3.25.1 (app-root) sqlite3 --version 3.36.0 2021-06-18 18:36:39 (app-root) python --version Python 3.8.11 ``` Dockerfile ``` FROM centos/python-38-centos7 USER root RUN yum update -y RUN yum upgrade -y # epel RUN yum -y install epel-release && yum clean all # SQLite RUN yum -y install zlib-devel geos geos-devel proj proj-devel freexl freexl-devel libxml2-devel WORKDIR /build/ COPY sqlite-autoconf-3360000.tar.gz ./ RUN tar -zxf sqlite-autoconf-3360000.tar.gz WORKDIR /build/sqlite-autoconf-3360000 RUN ./configure RUN make RUN make install # RUN /opt/app-root/bin/python3.8 -m pip install --upgrade pip RUN pip install sqlite-utils ``` | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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