diff options
Diffstat (limited to 'storage/innodb_plugin/include/buf0buf.h')
| -rw-r--r-- | storage/innodb_plugin/include/buf0buf.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/storage/innodb_plugin/include/buf0buf.h b/storage/innodb_plugin/include/buf0buf.h index 86c47a6edba..9856bfce409 100644 --- a/storage/innodb_plugin/include/buf0buf.h +++ b/storage/innodb_plugin/include/buf0buf.h @@ -427,6 +427,18 @@ buf_block_get_freed_page_clock( __attribute__((pure)); /********************************************************************//** +Tells if a block is still close enough to the MRU end of the LRU list +meaning that it is not in danger of getting evicted and also implying +that it has been accessed recently. +Note that this is for heuristics only and does not reserve buffer pool +mutex. +@return TRUE if block is close to MRU end of LRU */ +UNIV_INLINE +ibool +buf_page_peek_if_young( +/*===================*/ + const buf_page_t* bpage); /*!< in: block */ +/********************************************************************//** Recommends a move of a block to the start of the LRU list if there is danger of dropping from the buffer pool. NOTE: does not reserve the buffer pool mutex. @@ -1334,6 +1346,8 @@ struct buf_pool_stat_struct{ ulint n_pages_written;/*!< number write operations */ ulint n_pages_created;/*!< number of pages created in the pool with no read */ + ulint n_ra_pages_read_rnd;/*!< number of pages read in + as part of random read ahead */ ulint n_ra_pages_read;/*!< number of pages read in as part of read ahead */ ulint n_ra_pages_evicted;/*!< number of read ahead |