mirror of
https://github.com/microsoft/BCQuality.git
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62dabf9a11
The /samples/ top-level tree is replaced with sibling files in each
knowledge-layer folder. An article and its demonstrations now live
side-by-side:
microsoft/knowledge/<domain>/<slug>.md
microsoft/knowledge/<domain>/<slug>.good.al
microsoft/knowledge/<domain>/<slug>.bad.al
Rationale:
- Proximity. An article and its paired samples are one unit; the
filesystem now reflects that.
- Layer ownership. Samples inherit layer precedence for free -- a
/custom/ fork can override an article and its samples atomically,
which the shared /samples/ tree previously made awkward.
- Trivial migration path. Action-skill source globs
(*/knowledge/<domain>/**/*.md) are unchanged; sample discovery is a
sibling-filename lookup.
Changes:
- git mv of all 65 sample files from samples/<domain>/<slug>/{bad,good}.al
to microsoft/knowledge/<domain>/<slug>.{bad,good}.al (history preserved).
- Update See-sample references in all 37 articles that ship samples.
- skills/read.md: replace the no-code-blocks bullet with a pointer to a
new Sample files section that fully specifies the sibling convention,
the kinds (good/bad + forward-compatible), multi-technology rules,
demonstration-only status, and layer-precedence behaviour.
- skills/write.md: update the samples pointer to match.
- README.md: annotate the knowledge tree with the sample sibling shape.
- samples/README.md deleted; content lifted into skills/read.md.
- Both generators (C:\temp\gen_performance_knowledge.py,
C:\temp\gen_security_knowledge.py) updated to emit at the new paths
and to stop writing samples/README.md. Re-running them is idempotent
against the committed layout.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
29 lines
1.4 KiB
Markdown
29 lines
1.4 KiB
Markdown
---
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bc-version: [26..28]
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domain: performance
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keywords: [transaction, lock, scope, contention]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Keep transaction scope short
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> **Seed article.** Converted from an existing performance-review prompt to bootstrap the BCQuality performance corpus. Domain stewards should expand, restructure, and refine as needed.
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## Description
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Every write operation runs inside a transaction that holds locks until the transaction ends. Long transactions increase blocking, deadlocks, and timeouts for other sessions. The same work split across narrower transactions typically completes faster under load because it holds locks for less time.
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## Best Practice
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Perform data reads, calculations, and external integrations outside the transaction whenever possible. Enter the writing phase with all inputs computed, execute the minimum set of Insert, Modify, and Delete calls, and exit. If you have a long-running batch, split it into checkpoints at safe boundaries (see avoid-commit-inside-loops).
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See sample: `keep-transaction-scope-short.good.al`.
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## Anti Pattern
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Opening a transaction, then performing external web-service calls, heavy report runs, or user-facing dialogs while the locks are held, suspends every other session that needs the same rows for as long as the external operation takes.
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See sample: `keep-transaction-scope-short.bad.al`.
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