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ClickHouse® is a real-time analytics DBMS
fdeaf55b0f
Recent failures on CI [1]:
2024.10.06 16:28:33.624022 [ 620 ] {0e953192-be08-422a-a21f-c3b6f8f5e24d} <Debug> executeQuery: (from [::1]:58814) (comment: 02125_many_mutations.sh) system start merges many_mutations; (stage: Complete)
2024.10.06 16:28:33.624022 [ 620 ] {0e953192-be08-422a-a21f-c3b6f8f5e24d} <Debug> executeQuery: (from [::1]:58814) (comment: 02125_many_mutations.sh) system start merges many_mutations; (stage: Complete)
2024.10.06 16:28:33.624408 [ 620 ] {0e953192-be08-422a-a21f-c3b6f8f5e24d} <Debug> TCPHandler: Processed in 0.00091483 sec.
2024.10.06 16:28:33.624480 [ 929 ] {} <Debug> MutationsInterpreter(test_xa6pnknp.many_mutations): Will use old analyzer to prepare mutation
...
2024.10.06 16:28:33.625358 [ 620 ] {d6a3f295-498f-48e2-8af7-bbec46e03a7e} <Debug> executeQuery: (from [::1]:58814) (comment: 02125_many_mutations.sh) optimize table many_mutations final SETTINGS optimize_throw_if_noop = 1; (stage: Complete)
...
2024.10.06 16:28:37.765705 [ 929 ] {} <Debug> MutationsInterpreter(test_xa6pnknp.many_mutations): Will use old analyzer to prepare mutation
2024.10.06 16:28:37.765881 [ 929 ] {} <Trace> DiskLocal: Reserved 1.00 MiB on local disk `default`, having unreserved 127.09 GiB.
2024.10.06 16:28:37.765946 [ 620 ] {d6a3f295-498f-48e2-8af7-bbec46e03a7e} <Debug> test_xa6pnknp.many_mutations (32de70b8-ea0a-4766-ac95-8ebc7923205e): Waiting for currently running merges (1 parts are merging right now) to perform OPTIMIZE FINAL
...
2024.10.06 16:28:37.968946 [ 1227 ] {32de70b8-ea0a-4766-ac95-8ebc7923205e::all_1_1_0_20001} <Debug> MutationsInterpreter(test_xa6pnknp.many_mutations): Will use old analyzer to prepare mutation
...
2024.10.06 16:31:24.077825 [ 620 ] {d6a3f295-498f-48e2-8af7-bbec46e03a7e} <Information> test_xa6pnknp.many_mutations (32de70b8-ea0a-4766-ac95-8ebc7923205e): Cannot OPTIMIZE table: Timeout (120000 ms) while waiting for already running merges before running OPTIMIZE with FINAL. Cannot select pa>
...
2024.10.06 16:31:33.473249 [ 1235 ] {32de70b8-ea0a-4766-ac95-8ebc7923205e::all_1_1_0_20001} <Trace> test_xa6pnknp.many_mutations (32de70b8-ea0a-4766-ac95-8ebc7923205e): Renaming temporary part tmp_mut_all_1_1_0_20001 to all_1_1_0_20001 with tid (1, 1, 00000000-0000-0000-0000-000000000000).
...
2024.10.06 16:31:34.944518 [ 1268 ] {} <Trace> test_xa6pnknp.many_mutations (32de70b8-ea0a-4766-ac95-8ebc7923205e): Removing mutation: mutation_2.txt
2024.10.06 16:31:34.945149 [ 1268 ] {} <Trace> test_xa6pnknp.many_mutations (32de70b8-ea0a-4766-ac95-8ebc7923205e): Removing mutation: mutation_3.txt
[1]: https://s3.amazonaws.com/clickhouse-test-reports/70358/eca9ec566a63a9046bb3f1c9373d671946a95ba4/stateless_tests__aarch64_.html
The problem is that after "start merges" all mutations will start, and
the OPTIMIZE may be blocked for too long due to too much mutations in
the queue.
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
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ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.
How To Install (Linux, macOS, FreeBSD)
curl https://clickhouse.com/ | sh
Useful Links
- Official website has a quick high-level overview of ClickHouse on the main page.
- ClickHouse Cloud ClickHouse as a service, built by the creators and maintainers.
- Tutorial shows how to set up and query a small ClickHouse cluster.
- Documentation provides more in-depth information.
- YouTube channel has a lot of content about ClickHouse in video format.
- Slack and Telegram allow chatting with ClickHouse users in real-time.
- Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
- Code Browser (github.dev) with syntax highlighting, powered by github.dev.
- Contacts can help to get your questions answered if there are any.
Monthly Release & Community Call
Every month we get together with the community (users, contributors, customers, those interested in learning more about ClickHouse) to discuss what is coming in the latest release. If you are interested in sharing what you've built on ClickHouse, let us know.
- v24.10 Community Call - October 31
Upcoming Events
Keep an eye out for upcoming meetups and events around the world. Somewhere else you want us to be? Please feel free to reach out to tyler <at> clickhouse <dot> com. You can also peruse ClickHouse Events for a list of all upcoming trainings, meetups, speaking engagements, etc.
Upcoming meetups
- Jakarta Meetup - October 1
- Singapore Meetup - October 3
- Madrid Meetup - October 22
- Oslo Meetup - October 31
- Barcelona Meetup - November 12
- Ghent Meetup - November 19
- Dubai Meetup - November 21
- Paris Meetup - November 26
Recently completed meetups
- ClickHouse Guangzhou User Group Meetup - August 25
- Seattle Meetup (Statsig) - August 27
- Melbourne Meetup - August 27
- Sydney Meetup - September 5
- Zurich Meetup - September 5
- San Francisco Meetup (Cloudflare) - September 5
- Raleigh Meetup (Deutsche Bank) - September 9
- New York Meetup (Rokt) - September 10
- Toronto Meetup (Shopify) - September 10
- Chicago Meetup (Jump Capital) - September 12
- London Meetup - September 17
- Austin Meetup - September 17
- Bangalore Meetup - September 18
- Tel Aviv Meetup - September 22
Recent Recordings
- Recent Meetup Videos: Meetup Playlist Whenever possible recordings of the ClickHouse Community Meetups are edited and presented as individual talks. Current featuring "Modern SQL in 2023", "Fast, Concurrent, and Consistent Asynchronous INSERTS in ClickHouse", and "Full-Text Indices: Design and Experiments"
- Recording available: v24.8 LTS Release Call All the features of 24.8 LTS, one convenient video! Watch it now!
Interested in joining ClickHouse and making it your full-time job?
We are a globally diverse and distributed team, united behind a common goal of creating industry-leading, real-time analytics. Here, you will have an opportunity to solve some of the most cutting-edge technical challenges and have direct ownership of your work and vision. If you are a contributor by nature, a thinker and a doer - we’ll definitely click!
Check out our current openings here: https://clickhouse.com/company/careers
Can't find what you are looking for, but want to let us know you are interested in joining ClickHouse? Email careers@clickhouse.com!