Ashin Gau 3e186a8821 [opt](MergedIO) optimize merge small IO, prevent amplified read (#20305) ...

Optimize the strategy of merging small IO to prevent severe read amplification, and turn off merged IO when file cache enabled.
Adjustable parameters:
```
// the max amplified read ratio when merging small IO
max_amplified_read_ratio=0.8
// the min segment size
file_cache_min_file_segment_size = 1048576
```

2023-06-03 10:51:24 +08:00

..

src

[opt](MergedIO) optimize merge small IO, prevent amplified read (#20305)

2023-06-03 10:51:24 +08:00

test

[fix](olap) deletion statement with space conditions did not take effect (#20349)

2023-06-02 13:52:57 +08:00

CMakeLists.txt

[chore](arm) support build with hadoop libhdfs on arm (#20256)

2023-05-31 13:57:48 +08:00