max batch size env var tip

[DenhamPreen]

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Project	Deployment	Preview	Comments	Updated (UTC)
envio-docs	Ready	Preview	Comment	Aug 23, 2025 10:32pm

[coderabbitai]

Walkthrough

Adds documentation for a new public environment variable MAX_BATCH_SIZE in HyperIndex, describing its purpose, default (5000), and diagnostic use (set to 1). Updates the Envio-specific env var list and example block to include MAX_BATCH_SIZE with comments.

Changes

Cohort / File(s)	Summary
Docs — HyperIndex env var docs/HyperIndex/Guides/environment-variables.md	Documented MAX_BATCH_SIZE as in-memory batch size before DB writes, noted default (5000) and troubleshooting tip (set to 1). Added to Envio-specific vars and example env block.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

I twitch my whiskers at a tidy line,
MAX_BATCH_SIZE set—oh how divine!
Five-thousand hops, then burrow to write,
Or set it to 1 to catch errors in flight.
Docs nibble-ready, carrots aligned just right. 🥕

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📥 Commits

Reviewing files that changed from the base of the PR and between 29cfc49 and 46565bb.

📒 Files selected for processing (1)

• docs/HyperIndex/Guides/environment-variables.md (2 hunks)

🔇 Additional comments (2)

docs/HyperIndex/Guides/environment-variables.md (2)

59-60: Align example with chosen variable name and add performance caution

Please update the snippet at lines 59–60 to exactly match the decision you made at lines 34–35, and include a “debug only” note to prevent accidental slowdowns:

• If you renamed the setting to ENVIO_MAX_BATCH_SIZE, use:

  # In-memory batch size (default 5000). Set to 1 for debugging only (very slow).
  ENVIO_MAX_BATCH_SIZE=1

• If you kept the exception variable as MAX_BATCH_SIZE, use:

  # In-memory batch size (default 5000). Set to 1 for debugging only (very slow).
  MAX_BATCH_SIZE=1

Please verify which option was chosen earlier and ensure the example stays in sync.

---

34-35: It looks like the code block toward the bottom of this guide already shows an example .env snippet using the unprefixed MAX_BATCH_SIZE:

# In-memory batch size (default 5000)
MAX_BATCH_SIZE=1

Since we cannot find any references to ENVIO_MAX_BATCH_SIZE in the codebase (and the guide explicitly shows MAX_BATCH_SIZE in its example), the unprefixed variable is real and intentional. We should therefore document it as an exception to the ENVIO_ naming convention rather than renaming it—otherwise readers will be confused by the existing example.

Rewritten comment:

Please document MAX_BATCH_SIZE as a deliberate exception to the ENVIO_ prefix rule. Update the Naming Convention section and the variable’s bullet:

## Naming Convention

-All environment variables used by Envio must be prefixed with `ENVIO_`. This naming convention:
+All environment variables used by Envio must be prefixed with `ENVIO_`, **except `MAX_BATCH_SIZE`**, which controls the in-memory batch size before writing to the database. This naming convention:

- - `MAX_BATCH_SIZE`: Size of the in-memory batch before writing to the database. Default: `5000`. Set to `1` to help isolate which event or data save is causing Postgres write errors.
+ - `MAX_BATCH_SIZE` (exception): Size of the in-memory batch before writing to the database. Default: `5000`. Set to `1` (debug only) to isolate which event or data save causes Postgres write errors; this significantly slows indexing.

And ensure the example block remains:

# In-memory batch size (default 5000)
MAX_BATCH_SIZE=1

This clarifies both the convention and the one-off exception in a single pass.

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch dp/max-batch-size

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