Data structure to hold information about about how much space in an uncompressed page should be left as padding to avoid compression failures. More...

#include <dict0mem.h>

Public Attributes
SysMutex *	mutex
	mutex protecting the info More...

std::atomic< ulint >	pad
	number of bytes used as pad More...

ulint	success
	successful compression ops during current round More...

ulint	failure
	failed compression ops during current round More...

ulint	n_rounds
	number of currently successful rounds More...

std::atomic< os_once::state_t >	mutex_created
	Creation state of mutex member. More...

Detailed Description

Data structure to hold information about about how much space in an uncompressed page should be left as padding to avoid compression failures.

This estimate is based on a self-adapting heuristic.

Member Data Documentation

◆ failure

ulint zip_pad_info_t::failure

failed compression ops during current round

◆ mutex

SysMutex* zip_pad_info_t::mutex

mutex protecting the info

◆ mutex_created

std::atomic<os_once::state_t> zip_pad_info_t::mutex_created

Creation state of mutex member.

◆ n_rounds

ulint zip_pad_info_t::n_rounds

number of currently successful rounds

◆ pad

std::atomic<ulint> zip_pad_info_t::pad

number of bytes used as pad

◆ success

ulint zip_pad_info_t::success

successful compression ops during current round

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

storage/innobase/include/dict0mem.h

Public Attributes