ClickHouse Outage History

ClickHouse had 35 outages in the last 2 years totaling 38h 31m of downtime — averaging 1.4 incidents per month.

There were 35 ClickHouse outages since September 17, 2025 totaling 38h 31m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.clickhouse.com

Major November 20, 2025

Investigating failed ClickPipes

Detected by Pingoru: Nov 20, 2025, 02:29 PM UTC
Resolved: Nov 20, 2025, 03:25 PM UTC
Duration: 56m

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Minor November 14, 2025

Increased latency on the public API

Detected by Pingoru: Nov 14, 2025, 01:08 PM UTC
Resolved: Nov 14, 2025, 02:28 PM UTC
Duration: 1h 20m

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Minor November 12, 2025

Increased latency and error rate for prometheus endpoint (ClickPipes only)

Detected by Pingoru: Nov 12, 2025, 08:59 AM UTC
Resolved: Nov 12, 2025, 09:26 AM UTC
Duration: 27m

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Major November 7, 2025

Some object storage ClickPipes are failing

Detected by Pingoru: Nov 07, 2025, 10:59 PM UTC
Resolved: Nov 08, 2025, 02:02 AM UTC
Duration: 3h 3m

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Minor November 4, 2025

AWS us-east-1 DNS issue

Detected by Pingoru: Nov 04, 2025, 04:39 AM UTC
Resolved: Nov 04, 2025, 03:44 AM UTC
Duration: —

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Major October 20, 2025

Partial outage across all regions for ClickPipes CDC

Detected by Pingoru: Oct 20, 2025, 03:50 PM UTC
Resolved: Oct 20, 2025, 07:07 PM UTC
Duration: 3h 17m

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Major October 20, 2025

AWS outage in us-east-1 is causing service disruption

Detected by Pingoru: Oct 20, 2025, 07:19 AM UTC
Resolved: Oct 21, 2025, 07:26 AM UTC
Duration: 1d

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Major September 29, 2025

AWS us-east-2 connectivity issues

Detected by Pingoru: Sep 29, 2025, 02:49 PM UTC
Resolved: Sep 29, 2025, 03:43 PM UTC
Duration: 54m

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Minor September 24, 2025

Cloud Console degradation

Detected by Pingoru: Sep 24, 2025, 06:14 PM UTC
Resolved: Sep 24, 2025, 10:04 PM UTC
Duration: 3h 49m

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Critical September 17, 2025

SQL Console and Cloud API Unavailable

Detected by Pingoru: Sep 17, 2025, 03:20 PM UTC
Resolved: Sep 17, 2025, 03:56 PM UTC
Duration: 36m

Read the full incident report →