Structure for persisting dynamic metadata of data dictionary. More...

#include <dict0dict.h>

Classes
class	Enable_immediate
	Write dynamic metadata to DD buffer table immediately when such data is generated. More...

Public Member Functions
bool	check_persist_immediately () const

Public Attributes
	dirty_dict_tables
	List of tables whose dirty_status are marked as METADATA_DIRTY, or METADATA_BUFFERED. More...

ib_mutex_t	mutex
	Mutex to protect data in this structure, also the dict_table_t::dirty_status and dict_table_t::in_dirty_dict_tables_list This mutex should be low-level one so that it can be used widely when necessary, so its level had to be above SYNC_LOG. More...

std::atomic< uint32_t >	num_dirty_tables
	Number of the tables which are of status METADATA_DIRTY. More...

std::atomic< bool >	m_persist_immediately
	If set, dynamic metadata is saved to DD buffer table immediately. More...

DDTableBuffer *	table_buffer
	DDTableBuffer table for persistent dynamic metadata. More...

Persisters *	persisters
	Collection of instances to persist dynamic metadata. More...

Detailed Description

Structure for persisting dynamic metadata of data dictionary.

Member Function Documentation

◆ check_persist_immediately()

bool dict_persist_t::check_persist_immediately ( ) const

inline

Returns: true if need to write dynamic metadata to DD buffer table immediately after logging.

Member Data Documentation

◆ dirty_dict_tables

dict_persist_t::dirty_dict_tables

List of tables whose dirty_status are marked as METADATA_DIRTY, or METADATA_BUFFERED.

It's protected by the mutex

◆ m_persist_immediately

std::atomic<bool> dict_persist_t::m_persist_immediately

If set, dynamic metadata is saved to DD buffer table immediately.

Currently we consider only auto increment PM_TABLE_AUTO_INC. Corrupt index PM_INDEX_CORRUPTED is not needed to be saved immediately.

◆ mutex

ib_mutex_t dict_persist_t::mutex

Mutex to protect data in this structure, also the dict_table_t::dirty_status and dict_table_t::in_dirty_dict_tables_list This mutex should be low-level one so that it can be used widely when necessary, so its level had to be above SYNC_LOG.

However, after this mutex, persister may have to access B-tree and require tree latch, the latch level of this mutex then has to be right before the SYNC_INDEX_TREE.

◆ num_dirty_tables

std::atomic<uint32_t> dict_persist_t::num_dirty_tables

Number of the tables which are of status METADATA_DIRTY.

It's protected by the mutex

◆ persisters

Persisters* dict_persist_t::persisters

Collection of instances to persist dynamic metadata.

◆ table_buffer

DDTableBuffer* dict_persist_t::table_buffer

DDTableBuffer table for persistent dynamic metadata.

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

storage/innobase/include/dict0dict.h

Classes

Public Member Functions

Public Attributes