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Vectle found the following relevant skills: - Approval workflow immutable submitted revision optimistic concurrency transaction outbox notifications publish - guardrails for agents writing production SQL
Problem outcome: unknown
Public search query: EF Core production migrations reviewed allowlist SHA256 generated SQL explicit deployment opt in backup transaction advisory lock immutable release artifact approval staging
Problem outcome: unknown
Diagnoses a Percona Server for MySQL 8.0 startup where the config_file variable does not point at the configuration file an admin moved to /etc/percona, by printing the build-specific option-file search order, separating the main defaults file from !includedir merges, and running a sentinel-value test. Use when config…
Shows how to build a public audit history projection for document approvals that cannot leak private review notes: filter at projection time on both document status and event visibility, store the public read model in a separate table with no private columns, and handle unpublish, rebuilds and counts. Use when exposin…
Shows how to design a read-only service API with modular least-privilege scopes: one scoped service token per module, read-only enforcement at route, scope and data layers, published-only filtering inside the base query, allowlist response projection for user privacy, and coarse opt-in handling for presence data. Use …
Shows how to build named opaque API tokens in ASP.NET Core: issue a prefixed random token once, store only its hash, authenticate it in a dedicated scheme, scope and revoke it per endpoint, and add per-token rate limiting and usage aggregates. Use when replacing shared bearer secrets with revocable per-client tokens. …
Find the last successful refresh or calculation timestamp, fix what stopped that job, force one refresh, and compare the served value against a direct query of the source. Use when you see this exact failure in Metabase and the affected record or object can be named. Not for a different Metabase error with another mes…
Find the last successful refresh or calculation timestamp, fix what stopped that job, force one refresh, and compare the served value against a direct query of the source. Use when you see this exact failure in Metabase and the affected record or object can be named. Not for a different Metabase error with another mes…
Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Use when you see this exact failure in Apache Superset and the affected record or object can be named. Not for a different Apache Supe…
Describes how to fix mysqldump failing with error 1045 access denied during backup by matching the exact user and host entry, testing the same connection the dump uses, and repairing grants and defaults files. Use when a MySQL dump starts or stops with 1045. Not for error 2013 lost connection, which is a separate netw…
Fixes a Metabase card that fails because a column no longer exists by syncing the schema and updating the question to the current field name. Use when a saved question breaks after a table change. Not for a whole database connection failure affecting every card.
Fixes a Metabase dashboard that returns empty results because a dashboard filter is not mapped to a card field. Use when cards load without errors but show no data only on the dashboard. Not for a question that is also empty when opened on its own.
Fixes a Snowflake SQL compilation error saying object USAGE_EVENTS does not exist so the churn scoring job runs again, by correcting name resolution and access. Use when the job fails at compile time. Not for a query that runs but returns wrong numbers.
Builds an authenticated EF Core employee directory that returns only a minimal public DTO: exclusion of blocked and system accounts before search and counting, server-side Select projection with no admin fields, an allowlisted sort with an id tie-breaker, and clamped pagination. Use when a directory endpoint returns u…
Vectle found the following relevant skills: - "too many clients already": direct connections exhausted max_connections - mysql error: Too many connections - how to find whats leaking connections
Problem outcome: unknown
Public search query: mysql: Too many connections: max_connections tuning
Problem outcome: unknown
Fixes ipython-sql result sets so large the display truncates and kernel memory spikes. Use when a %%sql query returns far more rows than the notebook can hold. Not for connection or dialect errors.
How to fix a parallel backfill where every worker scanned the full table: partitioning the work by key ranges so workers divide the table instead of duplicating it. Use when parallel workers show full-table scans and throughput collapses. Not for backfills that are slow for other reasons.
How to fix a migration preview that lied because the dry run used a different postgres search_path than the real migration: aligning the two and making previews trustworthy. Use when the dry-run output does not match what the migration actually does. Not for previews that are wrong for other reasons.
Recovery when a column rename broke microservices that were still reading the old name: restoring compatibility immediately, then doing the rename properly with dual-write and phased reader migration. Use when a rename broke unknown readers. Not for renames with no live readers.
Recovery from a backfill that ran in one giant transaction and filled the disk with WAL: freeing space safely, rewriting the backfill as committed batches with checkpoints, and resuming. Use when a single-transaction backfill exhausts disk. Not for slow-but-steady backfills.
How to fix a bulk backfill failing on foreign key checks: ordering inserts parents-first, or disabling the checks for the load session and re-validating after. Use when every backfill batch fails on FK violations. Not for genuinely orphaned data.
How to specify the DSN for pt-online-schema-change's "Cannot connect to MySQL" error: the DSN part syntax, authentication options, and a working command template. Use when pt-osc cannot connect because the DSN is malformed or the credentials are passed wrong. Not for connection failures with a correct DSN (check netwo…
A recovery playbook for golang-migrate's Dirty database version error: how to inspect what the failed migration partially applied, finish or undo it by hand, clear the dirty flag with migrate force, and verify the chain is clean. Use when migrate refuses to run because a version is marked dirty. Not for migrations tha…