Compression statistics for a given page size. More...

#include <page0types.h>

Public Member Functions
	page_zip_stat_t ()

Public Attributes
ulint	compressed
	Number of page compressions. More...

ulint	compressed_ok
	Number of successful page compressions. More...

ulint	decompressed
	Number of page decompressions. More...

std::chrono::microseconds	compress_time
	Duration of page compressions. More...

std::chrono::microseconds	decompress_time
	Duration of page decompressions. More...

bool	dropped {false}
	The pages can linger in BP for a while after the index was already dropped. More...

Detailed Description

Compression statistics for a given page size.

Constructor & Destructor Documentation

◆ page_zip_stat_t()

page_zip_stat_t::page_zip_stat_t ( )

inline

Member Data Documentation

◆ compress_time

std::chrono::microseconds page_zip_stat_t::compress_time

Duration of page compressions.

◆ compressed

ulint page_zip_stat_t::compressed

Number of page compressions.

◆ compressed_ok

ulint page_zip_stat_t::compressed_ok

Number of successful page compressions.

◆ decompress_time

std::chrono::microseconds page_zip_stat_t::decompress_time

Duration of page decompressions.

◆ decompressed

ulint page_zip_stat_t::decompressed

Number of page decompressions.

◆ dropped

bool page_zip_stat_t::dropped {false}

The pages can linger in BP for a while after the index was already dropped.

Compression and decompression are done at very low level. We have no access to a dict_index_t object there. Such objects might be evicted by LRU anyway. We use this flag here to indicate that the stats for this index are no longer of interest. This way this information is easily accessible to the low-level logic, and can outlive eviction or drop of dict_index_t.

The documentation for this struct was generated from the following file:

storage/innobase/include/page0types.h

Public Member Functions

Public Attributes