mirror of
https://github.com/supabase/supabase.git
synced 2026-10-06 09:55:06 +03:00
Miranda Limonczenko
976e7338bc
## I have read the [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) file. YES ## What kind of change does this PR introduce? Docs update. Restructure, mostly moved lines, plus inbound anchor fixes. ## What is the current behavior? The page states the same routing decision four times and never states an answer: - Intro bullets - A matrix table - A "How to choose the right connection method?" section - A Mermaid flowchart An agent asked "I'm deploying to Vercel serverless functions, set up the database connection" has to synthesize an answer from four partial, inconsistent restatements. Context, procedure, and reference material are interleaved throughout, so background reading interrupts the action path. The page is also too long at 2,883 words, and grouping alone doesn't fix that. Explainer and reference material need their own page, and the troubleshooting group belongs in troubleshooting entries. 16 of the 19 inbound anchor links to this page are already broken on `master`, before any restructure: `#direct-connections`, `#shared-pooler`, `#connection-pooler`, `#how-connection-pooling-works`, `#quick-summary`, `#connection-pool`, and `#connecting-with-drizzle`. Groundwork for [DOCS-1312](https://linear.app/supabase/issue/DOCS-1312). The issue stays open until the paired eval is re-run. ## What is the new behavior? Group the guide into a decision, a procedure, context, reference, and troubleshooting, per CONTRIBUTING § Guides on mixed information types. Review with `git diff --color-moved=zebra`. - Lead with "Which connection method do you use?", a decision table keyed on where your code runs. Section navigation sits directly below the intro. - Collect every connection string under "Get your connection string", with the shared Connect dialog steps stated once as a procedure. - Move the endpoint, port, pool size, and connection limit material into "Connection reference". These were FAQ questions. - Split the page. The guide keeps the decision, the connection strings, and the quickstarts, at 1,180 words and three paths. A new child page, Connection pooling and limits, carries how pooling works, pool size, connection limits, and monitoring. - Move the endpoint and IP version table up beside the connection strings it explains. - Replace the troubleshooting group with two new troubleshooting entries, `tenant-or-user-not-found` and `fatal-password-authentication-failed`, plus links to the existing entries. The existing connection-refused entry is stronger than what was here: it names the IP ban and gives the unban procedure. - Cut the pool size worked example. It said a pool size of 30 is a shared ceiling across session and transaction mode, while the Supavisor FAQ and the terminology entry both say pool size is per user, database, and mode combination. That text came from `master`, so the contradiction is pre-existing. Link the FAQ as the authority rather than picking a side. - Drop the duplicate `pg_stat_ssl` query, which already exists in `connection-management.mdx` and `monitor-supavisor-postgres-connections.mdx`, both with column tables this page lacked. - Add the subsection to the navigation, which also adopts `connecting-to-postgres/serverless-drivers`. That page existed on disk and was referenced nowhere in the navigation constants. - Delete the decision flowchart. It was the fourth restatement of the decision table, and its logic was broken: `Persistent Backend` had two unconditional edges into decision nodes that each had one unlabeled output, so neither node decided anything. - Fix every broken inbound anchor, and pin stable anchors on the headings they target. This now includes six files in `apps/www` that no earlier pass in this stack checked, most of which were already broken on `master`. - Repoint the Studio Connect sheet's Drizzle link at the Drizzle guide. It pointed at a heading this page hasn't had for some time. - Serverless drivers: state the guide's intent, give the three runtimes parallel structure, and link the transaction mode prepared statements constraint. That page never mentioned the constraint that most affects serverless connections. ## Additional context PR 2 of 2. Base is #49868, rebased on its review feedback commit. Three of the 13 files are in `apps/studio`, so this runs the Studio unit tests, build, and lint ratchet. They are link string changes only. The ESLint warning count is unchanged at 1 on the touched files, so the ratchet holds. ## Manual testing 1. Open [Connect to your database](https://docs-git-docs-connecting-to-postgres-structure-supabase.vercel.app/docs/guides/database/connecting-to-postgres) on the deploy preview. 2. Check the table of contents. The top level reads: Which connection method do you use?, Get your connection string, Quickstarts, Related. The intro lists three paths. 3. Open [Reports](https://docs-git-docs-connecting-to-postgres-structure-supabase.vercel.app/docs/guides/monitoring-and-debugging/reports) and follow "Implement connection pooling" under Disk IO. It lands on the decision table. 4. Open [Serverless drivers](https://docs-git-docs-connecting-to-postgres-structure-supabase.vercel.app/docs/guides/database/connecting-to-postgres/serverless-drivers). The intro links the transaction mode prepared statements constraint. 5. Check the sidebar. Connecting to your database expands to Connection pooling and limits and Serverless drivers. 6. Open [Connection pooling and limits](https://docs-git-docs-connecting-to-postgres-structure-supabase.vercel.app/docs/guides/database/connecting-to-postgres/pooling-and-limits). Pool size states the setting and links the Supavisor FAQ, with no worked example. 7. Open [Tenant or user not found](https://docs-git-docs-connecting-to-postgres-structure-supabase.vercel.app/docs/guides/troubleshooting/tenant-or-user-not-found). <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Added a dedicated guide covering connection pooling, limits, configuration, and monitoring. * Added troubleshooting guides for password authentication failures and shared pooler tenant or user errors. * Expanded connection guidance with method selection, endpoints, IP versions, and serverless driver configuration. * **Documentation** * Reorganized database connection documentation and navigation. * Updated related links throughout the documentation to current connection and pooling guidance. * Improved guidance for pooler modes, connection strings, and supported deployment environments. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
43 lines
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43 lines
2.7 KiB
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---
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id: 'performance'
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title: 'Performance Tuning'
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description: 'Getting the best results out of your Supabase project'
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---
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The Supabase platform automatically optimizes your Postgres database to take advantage of the compute resources of the plan your project is on. However, these optimizations are based on assumptions about the type of workflow the project is being used for, and it is likely that better results can be obtained by tuning the database for your particular workflow.
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## Examining query performance
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Unoptimized queries are a major cause of poor database performance. To analyze the performance of your queries, see [Inspect the database](/docs/guides/observability/inspect).
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## Optimizing the number of connections
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The default connection limits for Postgres and Supavisor is based on your compute size. See the default connection numbers in the [Compute Add-ons](/docs/guides/platform/compute-and-disk) section.
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If the number of connections is insufficient, you will receive the following error upon connecting to the DB:
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```shell
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$ psql -U postgres -h ...
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FATAL: remaining connection slots are reserved for non-replication superuser connections
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```
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In such a scenario, you can consider:
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- [upgrading to a larger compute add-on](/dashboard/project/_/settings/infrastructure)
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- configuring your clients to use fewer connections
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- manually configuring the database for a higher number of connections
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### Configuring clients to use fewer connections
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You can use the [pg_stat_activity](https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-PG-STAT-ACTIVITY-VIEW) view to debug which clients are holding open connections on your DB. `pg_stat_activity` only exposes information on direct connections to the database. Information on the number of connections to Supavisor is available [via the metrics endpoint](../telemetry/metrics).
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Depending on the clients involved, you might be able to configure them to work with fewer connections (e.g. by imposing a limit on the maximum number of connections they're allowed to use), or shift specific workloads to connect via [Supavisor](/docs/guides/database/connecting-to-postgres/pooling-and-limits#shared-pooler) instead. Transient workflows, which can scale up and down rapidly in response to traffic (e.g. serverless functions), can especially benefit from using a connection pooler rather than connecting to the DB directly.
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### Allowing higher number of connections
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You can configure Postgres connection limit among other parameters by using [Custom Postgres Config](/docs/guides/database/custom-postgres-config).
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### Enterprise
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[Contact us](https://forms.supabase.com/enterprise) if you need help tuning your database for your specific workflow.
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