id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason 642572841,MDU6SXNzdWU2NDI1NzI4NDE=,859,Database page loads too slowly with many large tables (due to table counts),3243482,open,0,,,21,2020-06-21T14:23:17Z,2021-08-25T21:59:55Z,,CONTRIBUTOR,,"Hey, I have a database that I save in HTML from couple of web scrapers. There are around 200k+, 50+ rows in a couple of tables, with sqlite file weighing around 600MB. The app runs on a VPS with 2 core CPU, 4GB RAM and refreshing database page regularly takes more than 10 seconds. I was suspecting that counting tables was the culprit, but manually running `select count(*) from table_name` for the largest table finishes under a second. I've looked at the source code. There's a check for index page for mutable databases larger than 100MB https://github.com/simonw/datasette/blob/799c5d53570d773203527f19530cf772dc2eeb24/datasette/views/index.py#L15 but this check is not performed for database page. I've manually crippled `Database::table_counts` method ```py async def table_counts(self, limit=10): if not self.is_mutable and self.cached_table_counts is not None: return self.cached_table_counts # Try to get counts for each table, $limit timeout for each count counts = {} for table in await self.table_names(): try: # table_count = ( # await self.execute( # ""select count(*) from [{}]"".format(table), # custom_time_limit=limit, # ) # ).rows[0][0] counts[table] = 10 # table_count # In some cases I saw ""SQL Logic Error"" here in addition to # QueryInterrupted - so we catch that too: except (QueryInterrupted, sqlite3.OperationalError, sqlite3.DatabaseError): counts[table] = None if not self.is_mutable: self.cached_table_counts = counts return counts ``` now the page loads in <100ms. Is it possible to apply size check on database page too?
/-/versions output
{
    ""python"": {
        ""version"": ""3.8.0"",
        ""full"": ""3.8.0 (default, Oct 28 2019, 16:14:01) \n[GCC 8.3.0]""
    },
    ""datasette"": {
        ""version"": ""0.44""
    },
    ""asgi"": ""3.0"",
    ""uvicorn"": ""0.11.5"",
    ""sqlite"": {
        ""version"": ""3.22.0"",
        ""fts_versions"": [
            ""FTS5"",
            ""FTS4"",
            ""FTS3""
        ],
        ""extensions"": {
            ""json1"": null
        },
        ""compile_options"": [
            ""COMPILER=gcc-7.4.0"",
            ""ENABLE_COLUMN_METADATA"",
            ""ENABLE_DBSTAT_VTAB"",
            ""ENABLE_FTS3"",
            ""ENABLE_FTS3_PARENTHESIS"",
            ""ENABLE_FTS3_TOKENIZER"",
            ""ENABLE_FTS4"",
            ""ENABLE_FTS5"",
            ""ENABLE_JSON1"",
            ""ENABLE_LOAD_EXTENSION"",
            ""ENABLE_PREUPDATE_HOOK"",
            ""ENABLE_RTREE"",
            ""ENABLE_SESSION"",
            ""ENABLE_STMTVTAB"",
            ""ENABLE_UNLOCK_NOTIFY"",
            ""ENABLE_UPDATE_DELETE_LIMIT"",
            ""HAVE_ISNAN"",
            ""LIKE_DOESNT_MATCH_BLOBS"",
            ""MAX_SCHEMA_RETRY=25"",
            ""MAX_VARIABLE_NUMBER=250000"",
            ""OMIT_LOOKASIDE"",
            ""SECURE_DELETE"",
            ""SOUNDEX"",
            ""TEMP_STORE=1"",
            ""THREADSAFE=1""
        ]
    }
}
",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/859/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",, 947640902,MDExOlB1bGxSZXF1ZXN0NjkyNTk2MDA2,1400,Bump black from 21.6b0 to 21.7b0,49699333,closed,0,,,1,2021-07-19T13:13:41Z,2021-08-25T01:29:56Z,2021-08-25T01:29:55Z,CONTRIBUTOR,simonw/datasette/pulls/1400,"Bumps [black](https://github.com/psf/black) from 21.6b0 to 21.7b0.
Release notes

Sourced from black's releases.

21.7b0

Black

Docker

Integrations

Changelog

Sourced from black's changelog.

21.7b0

Black

Docker

Integrations

Commits

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=black&package-manager=pip&previous-version=21.6b0&new-version=21.7b0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) ---
Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
",107914493,pull,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1400/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0, 970386262,MDExOlB1bGxSZXF1ZXN0NzEyMzQ2MTk5,1433,"Update trustme requirement from <0.9,>=0.7 to >=0.7,<0.10",49699333,closed,0,,,1,2021-08-13T13:10:24Z,2021-08-25T01:29:27Z,2021-08-25T01:29:26Z,CONTRIBUTOR,simonw/datasette/pulls/1433,"Updates the requirements on [trustme](https://github.com/python-trio/trustme) to permit the latest version.
Commits

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) ---
Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
",107914493,pull,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1433/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0, 978614898,MDExOlB1bGxSZXF1ZXN0NzE5MTc1NTkz,1447,Remove underscore from search mode parameter name,127565,closed,0,,,1,2021-08-25T01:28:04Z,2021-08-25T01:28:58Z,2021-08-25T01:28:58Z,CONTRIBUTOR,simonw/datasette/pulls/1447,The fulltext search documentation refers to the parameter as `searchmode` but the `metadata.json` example uses `search_mode`. The latter doesn't actually seem to work.,107914493,pull,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/1447/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0,