buf_stat_per_index_t Class Reference

Per index buffer pool statistics - contains how many pages for each index are cached in the buffer pool(s). More...

#include <buf0stats.h>

Public Member Functions
	buf_stat_per_index_t ()
	Constructor. More...
	~buf_stat_per_index_t ()
	Destructor. More...
void	inc (const index_id_t &id)
	Increment the number of pages for a given index with 1. More...
void	dec (const index_id_t &id)
	Decrement the number of pages for a given index with 1. More...
uint64_t	get (const index_id_t &id)
	Get the number of pages in the buffer pool for a given index. More...

Private Member Functions
bool	should_skip (const index_id_t &id)
	Assess if we should skip a page from accounting. More...

Private Attributes
ut_lock_free_hash_t *	m_store
	(key, value) storage. More...

Detailed Description

Per index buffer pool statistics - contains how many pages for each index are cached in the buffer pool(s).

This is a key,value store where the key is the index id and the value is the number of pages in the buffer pool that belong to this index.

Constructor & Destructor Documentation

buf_stat_per_index_t()

buf_stat_per_index_t::buf_stat_per_index_t ( )

inline

Constructor.

~buf_stat_per_index_t()

buf_stat_per_index_t::~buf_stat_per_index_t ( )

inline

Destructor.

Member Function Documentation

dec()

void buf_stat_per_index_t::dec ( const index_id_t &  id )

inline

Decrement the number of pages for a given index with 1.

Parameters

[in]

id

id of the index whose count to decrement

get()

uint64_t buf_stat_per_index_t::get ( const index_id_t &  id )

inline

Get the number of pages in the buffer pool for a given index.

Parameters

[in]

id

id of the index whose pages to peek

Returns

number of pages

inc()

void buf_stat_per_index_t::inc ( const index_id_t &  id )

inline

Increment the number of pages for a given index with 1.

Parameters

[in]

id

id of the index whose count to increment

should_skip()

bool buf_stat_per_index_t::should_skip ( const index_id_t &  id )

inlineprivate

Assess if we should skip a page from accounting.

Parameters

[in]

id

index_id of the page

Returns

true if it should not be accounted

Member Data Documentation

m_store

ut_lock_free_hash_t* buf_stat_per_index_t::m_store

private

(key, value) storage.

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

• storage/innobase/include/buf0stats.h