mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-10 01:25:21 +00:00
ClickHouse® is a real-time analytics DBMS
5253a7f650
Cgroups allows to change the amount of memory available to a process
while it runs. The previous logic calculated the amount of available
memory only once at server startup. As a result, memory thresholds set
via cgroups were not picked up when the settings changed. We now always
incorporate the current limits during re-configuraton.
Note 1: getMemoryAmount() opens/reads a file which is potentially
expensive. Should be fine though since that happens only when
the server configuration changes.
Note 2: An better approach would be to treat cgroup limit changes as
another trigger for ClickHouse server re-configuration (which
currently only happens when the config files change). Shied away
from that for now because of the case that when the cgroup limit
is lowered, there is no guarantee that ClickHouse can shrink the
memory amount accordingly in time (afaik, it does so only lazily
by denying new allocations). As a result, the OOM killer would
kill the server. The same will happen with this PR but at a
lower implementation complexity.
|
||
|---|---|---|
| .github | ||
| base | ||
| benchmark | ||
| cmake | ||
| contrib | ||
| docker | ||
| docs | ||
| packages | ||
| programs | ||
| rust | ||
| src | ||
| tests | ||
| utils | ||
| .clang-format | ||
| .clang-tidy | ||
| .clangd | ||
| .editorconfig | ||
| .exrc | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .pylintrc | ||
| .snyk | ||
| .yamllint | ||
| AUTHORS | ||
| CHANGELOG.md | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| format_sources | ||
| LICENSE | ||
| PreLoad.cmake | ||
| README.md | ||
| SECURITY.md | ||
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 (Woboq) with syntax highlighting and navigation.
- Code Browser (github.dev) with syntax highlighting, powered by github.dev.
- Static Analysis (SonarCloud) proposes C++ quality improvements.
- Contacts can help to get your questions answered if there are any.
Upcoming Events
- v23.8 Community Call - Aug 31 - 23.8 is rapidly approaching. Original creator, co-founder, and CTO of ClickHouse Alexey Milovidov will walk us through the highlights of the release.
- ClickHouse & AI - A Meetup in San Francisco - Aug 8
- ClickHouse Meetup in Paris - Sep 12
Also, keep an eye out for upcoming meetups around the world. Somewhere else you want us to be? Please feel free to reach out to tyler clickhouse com.
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: v23.6 Release Webinar All the features of 23.6, one convenient video! Watch it now!
- All release webinar recordings: YouTube playlist
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
Cant find what you are looking for, but want to let us know you are interested in joining ClickHouse? Email careers@clickhouse.com!