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Who published Qldb Diagnostics?

aws-samples (@aws-samples) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Qldb Diagnostics by aws-samples — Agent Skill

Name: Qldb Diagnostics
Author: aws-samples

Qldb Diagnostics

Use this skill to investigate and troubleshoot Amazon QLDB problems by analyzing ledgers, tables, PartiQL queries, journal export, verification, streaming, and performance using structured runbooks. Activate when: ledger creation failures, PartiQL errors, journal export issues, verification failures, streaming problems, or the user says something is wrong with QLDB.

aws-samples 87332d2 19 files · 67.5 KB Updated Sep 17, 2026

File contents

Amazon QLDB Diagnostics

When to use

Any Amazon QLDB investigation — ledgers, tables, PartiQL queries, journal export, verification, streaming, or performance troubleshooting.

Investigation workflow

Step 1 — Collect and triage

aws qldb list-ledgers
aws qldb describe-ledger --name <ledger-name>
aws qldb list-journal-kinesis-streams-for-ledger --ledger-name <name>
aws qldb list-journal-s3-exports-for-ledger --ledger-name <name>

Step 2 — Domain deep dive

aws qldb-session send-command --session-token <token> --start-session '{"LedgerName":"<name>"}'
aws qldb get-block --name <ledger-name> --block-address '{"IonText":"<address>"}'
aws qldb get-revision --name <ledger-name> --block-address '{"IonText":"<address>"}' --document-id <doc-id>

Step 3 — Detailed investigation

aws qldb get-digest --name <ledger-name>
aws cloudwatch get-metric-statistics --namespace AWS/QLDB --metric-name CommandLatency --dimensions Name=LedgerName,Value=<name> --start-time <start> --end-time <end> --period 300 --statistics Average
aws cloudtrail lookup-events --lookup-attributes AttributeKey=EventSource,AttributeValue=qldb.amazonaws.com --max-results 20

Read references/guardrails.md before concluding on any QLDB issue.

Anti-hallucination rules

Always cite specific ledger names, document IDs, or API responses as evidence.
QLDB is immutable. Never suggest deleting or modifying journal history.
PartiQL is NOT standard SQL. Never assume full SQL compatibility.
QLDB uses Ion data format. Never assume JSON-only support.
Verification uses cryptographic hashes. Never skip hash validation.
Spend no more than 2 minutes on any single hypothesis. Pivot if inconclusive.

14 runbooks

Category	IDs	Covers
A — Ledger	A1-A2	Creation failures, configuration
B — Tables	B1-B2	Table operations, indexes
C — PartiQL	C1-C2	Query errors, syntax issues
D — Journal	D1-D2	Export failures, S3 output
E — Verification	E1-E2	Digest verification, revision proof
F — Streaming	F1-F2	Kinesis streaming, delivery issues
G — Performance	G1-G2	Latency, throughput
Z — Catch-All	Z1	General troubleshooting

---name: qldb-diagnosticsdescription: Use this skill to investigate and troubleshoot Amazon QLDB problems by analyzing ledgers, tables, PartiQL queries, journal export, verification, streaming, and performance using structured runbooks. Activate when: ledger creation failures, PartiQL errors, journal export issues, verification failures, streaming problems, or the user says something is wrong with QLDB.---# Amazon QLDB Diagnostics## When to useAny Amazon QLDB investigation — ledgers, tables, PartiQL queries, journal export, verification, streaming, or performance troubleshooting.## Investigation workflow### Step 1 — Collect and triage```aws qldb list-ledgersaws qldb describe-ledger --name <ledger-name>aws qldb list-journal-kinesis-streams-for-ledger --ledger-name <name>aws qldb list-journal-s3-exports-for-ledger --ledger-name <name>```### Step 2 — Domain deep dive```aws qldb-session send-command --session-token <token> --start-session '{"LedgerName":"<name>"}'aws qldb get-block --name <ledger-name> --block-address '{"IonText":"<address>"}'aws qldb get-revision --name <ledger-name> --block-address '{"IonText":"<address>"}' --document-id <doc-id>```### Step 3 — Detailed investigation```aws qldb get-digest --name <ledger-name>aws cloudwatch get-metric-statistics --namespace AWS/QLDB --metric-name CommandLatency --dimensions Name=LedgerName,Value=<name> --start-time <start> --end-time <end> --period 300 --statistics Averageaws cloudtrail lookup-events --lookup-attributes AttributeKey=EventSource,AttributeValue=qldb.amazonaws.com --max-results 20```Read `references/guardrails.md` before concluding on any QLDB issue.## Anti-hallucination rules1. Always cite specific ledger names, document IDs, or API responses as evidence.2. QLDB is immutable. Never suggest deleting or modifying journal history.3. PartiQL is NOT standard SQL. Never assume full SQL compatibility.4. QLDB uses Ion data format. Never assume JSON-only support.5. Verification uses cryptographic hashes. Never skip hash validation.6. Spend no more than 2 minutes on any single hypothesis. Pivot if inconclusive.## 14 runbooks| Category | IDs | Covers ||----------|-----|--------|| A — Ledger | A1-A2 | Creation failures, configuration || B — Tables | B1-B2 | Table operations, indexes || C — PartiQL | C1-C2 | Query errors, syntax issues || D — Journal | D1-D2 | Export failures, S3 output || E — Verification | E1-E2 | Digest verification, revision proof || F — Streaming | F1-F2 | Kinesis streaming, delivery issues || G — Performance | G1-G2 | Latency, throughput || Z — Catch-All | Z1 | General troubleshooting |

Frequently asked questions