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doris/fe
lihangyu ab8125d56f [Improve](performance) introduce SchemaCache to cache TabletSchame & Schema (#20037)
* [Improve](performance) introduce SchemaCache to cache TabletSchame & Schema

1. When the system is under high-concurrency load with wide table point queries, the frequent memory allocation and deallocation of Schema become evident system bottlenecks. Additionally, the initialization of TabletSchema and Schema also becomes a CPU hotspot.Therefore, the introduction of a SchemaCache is implemented to cache these resources for reuse.

2. Make some variables wrapped with std::unique<unique_ptr>

Performance:
| 状态              | QPS | 平均响应时间 (avg) | P99 响应时间 |
|------------------|-----|------------------|-------------|
| 开启 SchemaCache | 501 | 20ms             | 34ms        |
| 关闭 SchemaCache | 321 | 31ms             | 61ms        |

* handle schema change with schema version

* remove useless header

* rebase
2023-05-29 17:34:53 +08:00
..

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# fe-common

This module is used to store some common classes of other modules.

# spark-dpp

This module is Spark DPP program, used for Spark Load function.
Depends: fe-common

# fe-core

This module is the main process module of FE.
Depends: fe-common, spark-dpp