clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- ClickHouse Merge Performance Bottleneck causing slower insertions with High-Volume Time-Series Ingestion
- Production stability of lightweight UPDATEs vs. ReplacingMergeTree for frequent status flips
- Add support for CONNECT_ATTRS MySQL protocol flag
- [CI crash] MergeTreeDataPartWide destruction causing index issues
- MergeTreeBackgroundExecutor: Lock acquisition took X ms
- Non-hardcoded default thread pool sizes
- Illegal opcode in `clickhouse-server:25.8.14` (`aarch64`)
- Unknown error
- Allow preserving \uXXXX Unicode escape sequences in JSON output
- add T64('byte_mask') codec variant - PEXT/PDEP bitpack
- Docs
- C++ not yet supported