alamb commented on code in PR #17031:
URL: https://github.com/apache/datafusion/pull/17031#discussion_r2255229675
##########
datafusion/execution/src/cache/cache_manager.rs:
##########
@@ -102,12 +118,19 @@ impl CacheManager {
}
/// Get the file embedded metadata cache.
- pub fn get_file_metadata_cache(&self) -> Option<Arc<dyn
FileMetadataCache>> {
- self.file_metadata_cache.clone()
+ pub fn get_file_metadata_cache(&self) -> Arc<dyn FileMetadataCache> {
+ Arc::clone(&self.file_metadata_cache)
+ }
+
+ /// Get the limit of the file embedded metadata cache.
+ pub fn get_file_metadata_cache_limit(&self) -> Option<usize> {
+ self.file_metadata_cache.cache_limit()
}
}
-#[derive(Clone, Default)]
+const DEFAULT_FILE_METADATA_CACHE_LIMIT: usize = 1024 * 1024 * 1024; // 1G
Review Comment:
I think 1GB is too high. I think should set it to something more like 50MB
or 100MB and ideally make it easy to tell when that limit was exceeded (some
sort of metrics or statistics)
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