buf_pool_stat_t Struct Reference

The buffer pool statistics structure. More...

#include <buf0buf.h>

Public Types
using	Shards = Counter::Shards< 64 >

Public Member Functions
void	reset ()

Static Public Member Functions
static void	copy (buf_pool_stat_t &dst, const buf_pool_stat_t &src) noexcept

Public Attributes
Shards	m_n_page_gets
	Number of page gets performed; also successful searches through the adaptive hash index are counted as page gets; this field is NOT protected by the buffer pool mutex. More...
std::atomic< uint64_t >	n_pages_read
	Number of read operations. More...
std::atomic< uint64_t >	n_pages_written
	Number of write operations. More...
std::atomic< uint64_t >	n_pages_created
	number of pages created in the pool with no read. More...
std::atomic< uint64_t >	n_ra_pages_read_rnd
	Number of pages read in as part of random read ahead. More...
std::atomic< uint64_t >	n_ra_pages_read
	Number of pages read in as part of read ahead. More...
uint64_t	n_ra_pages_evicted
	Number of read ahead pages that are evicted without being accessed. More...
uint64_t	n_pages_made_young
	Number of pages made young, in calls to buf_LRU_make_block_young(). More...
uint64_t	n_pages_not_made_young
	Number of pages not made young because the first access was not long enough ago, in buf_page_peek_if_too_old(). More...
uint64_t	LRU_bytes
	LRU size in bytes. More...
uint64_t	flush_list_bytes
	Flush_list size in bytes. More...

Detailed Description

The buffer pool statistics structure.

Member Typedef Documentation

Shards

using buf_pool_stat_t::Shards = Counter::Shards<64>

Member Function Documentation

copy()

static void buf_pool_stat_t::copy ( buf_pool_stat_t &  dst, const buf_pool_stat_t &  src  )

inlinestaticnoexcept

reset()

void buf_pool_stat_t::reset ( void  )

inline

Member Data Documentation

flush_list_bytes

uint64_t buf_pool_stat_t::flush_list_bytes

Flush_list size in bytes.

Protected by flush_list_mutex

LRU_bytes

uint64_t buf_pool_stat_t::LRU_bytes

LRU size in bytes.

Protected by LRU_list_mutex.

m_n_page_gets

Shards buf_pool_stat_t::m_n_page_gets

Number of page gets performed; also successful searches through the adaptive hash index are counted as page gets; this field is NOT protected by the buffer pool mutex.

n_pages_created

std::atomic<uint64_t> buf_pool_stat_t::n_pages_created

number of pages created in the pool with no read.

n_pages_made_young

uint64_t buf_pool_stat_t::n_pages_made_young

Number of pages made young, in calls to buf_LRU_make_block_young().

Protected by LRU_list_mutex.

n_pages_not_made_young

uint64_t buf_pool_stat_t::n_pages_not_made_young

Number of pages not made young because the first access was not long enough ago, in buf_page_peek_if_too_old().

Not protected.

n_pages_read

std::atomic<uint64_t> buf_pool_stat_t::n_pages_read

Number of read operations.

n_pages_written

std::atomic<uint64_t> buf_pool_stat_t::n_pages_written

Number of write operations.

n_ra_pages_evicted

uint64_t buf_pool_stat_t::n_ra_pages_evicted

Number of read ahead pages that are evicted without being accessed.

Protected by LRU_list_mutex.

n_ra_pages_read

std::atomic<uint64_t> buf_pool_stat_t::n_ra_pages_read

Number of pages read in as part of read ahead.

n_ra_pages_read_rnd

std::atomic<uint64_t> buf_pool_stat_t::n_ra_pages_read_rnd

Number of pages read in as part of random read ahead.

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

• storage/innobase/include/buf0buf.h