alamb commented on code in PR #16971:
URL: https://github.com/apache/datafusion/pull/16971#discussion_r2246489431
##########
datafusion/common/src/config.rs:
##########
@@ -549,6 +549,12 @@ config_namespace! {
/// (reading) Use any available bloom filters when reading parquet
files
pub bloom_filter_on_read: bool, default = true
+ /// (reading) Whether or not to enable the caching of embedded
metadata of Parquet files
+ /// (footer and page metadata). Enabling it can offer substantial
performance improvements
+ /// for repeated queries over large files. By default, the cache is
automatically
+ /// invalidated when the underlying file is modified.
+ pub cache_metadata: bool, default = false
Review Comment:
See https://github.com/apache/datafusion/issues/17001
##########
datafusion/common/src/config.rs:
##########
@@ -549,6 +549,12 @@ config_namespace! {
/// (reading) Use any available bloom filters when reading parquet
files
pub bloom_filter_on_read: bool, default = true
+ /// (reading) Whether or not to enable the caching of embedded
metadata of Parquet files
+ /// (footer and page metadata). Enabling it can offer substantial
performance improvements
+ /// for repeated queries over large files. By default, the cache is
automatically
+ /// invalidated when the underlying file is modified.
+ pub cache_metadata: bool, default = false
Review Comment:
- See https://github.com/apache/datafusion/issues/17001
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