Jokser commented on issue #13837:
URL: https://github.com/apache/arrow/issues/13837#issuecomment-1210454980
@rok
I tried it but without success.
The memory usage goes down only after explicit system pool release call:
```
spdlog::info("RSS before default pool release: {} bytes", getCurrentRSS());
arrow::default_memory_pool()->ReleaseUnused();
spdlog::info("RSS after default pool release: {} bytes", getCurrentRSS());
arrow::system_memory_pool()->ReleaseUnused();
spdlog::info("RSS after system pool release: {} bytes", getCurrentRSS());
```
```
[2022-08-10 13:01:47.281] [se_logger] [info] RSS before default pool
release: 29080805376 bytes
[2022-08-10 13:01:47.284] [se_logger] [info] RSS after default pool release:
29082968064 bytes
[2022-08-10 13:01:48.627] [se_logger] [info] RSS after system pool release:
6827900928 bytes
```
It was cut-off of ~22Gb. But there is still ~7Gb of data in RSS.
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