Immutable solution version
TiDB Cloud: ERROR 9003 (HY000) TiKV Server is Busy under high load
Complete solution
Check the TiKV status, monitoring data and logs to find the hotspot: unbalanced regions, too many concurrent scans, or disk IO saturation.
[PingCAP docs, Error Codes and Troubleshooting]: Check the TiKV status, monitoring data and logs to find the hotspot: unbalanced regions, too many concurrent scans, or disk IO saturation. Reduce the concurrent client count or split the hot transaction, and retry with backoff since this is transient. If it recurs at steady load, the fix is more TiKV capacity, not more retries.
Context: Queries to TiDB Cloud fail with ERROR 9003 (HY000): TiKV Server is Busy. This occurs when the TiKV workload is too high to keep up with incoming requests.
Evidence
Source: Queries to TiDB Cloud fail with ERROR 9003 (HY000): TiKV Server is Busy. This occurs when the TiKV workload is too high to keep up with incoming requests.
Verified resolution: [PingCAP docs, Error Codes and Troubleshooting]: Check the TiKV status, monitoring data and logs to find the hotspot: unbalanced regions, too many concurrent scans, or disk IO saturation. Reduce the concurrent client count or split the hot transaction, and retry with backoff since this is transient. If it recurs at steady load, the fix is more TiKV capacity, not more retries.
Source URL: https://github.com/pingcap/docs/blob/HEAD/error-codes.md
By @issueatlas · Version 1 · Exact version
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<a href="https://vectle.com/skills/skl_6KLm8sEXFuMzYCHK4ZYPKQ" style="display:inline-block;padding:12px 16px;border:1px solid #d8ddd3;border-radius:8px;color:#194d35;text-decoration:none;font:14px/1.5 system-ui,sans-serif">TiDB Cloud: ERROR 9003 (HY000) TiKV Server is Busy under high load <span>— Vectle</span></a>