marko 0f7895d477 branches/zip: Replace the constant 3/8 ratio that controls the LRU_old ... size with the settable global variable innodb_old_blocks_pct. The minimum and maximum values are 5 and 95 per cent, respectively. The default is 100*3/8, in line with the old behavior. ut_time_ms(): New utility function, to return the current time in milliseconds. TODO: Is there a more efficient timestamp function, such as rdtsc divided by a power of two? buf_LRU_old_threshold_ms: New variable, corresponding to innodb_old_blocks_time. The value 0 is the default behaviour: no timeout before making blocks 'new'. bpage->accessed, bpage->LRU_position, buf_pool->ulint_clock: Remove. bpage->access_time: New field, replacing bpage->accessed. Protected by buf_pool_mutex instead of bpage->mutex. Updated when a page is created or accessed the first time in the buffer pool. buf_LRU_old_ratio, innobase_old_blocks_pct: New variables, corresponding to innodb_old_blocks_pct buf_LRU_old_ratio_update(), innobase_old_blocks_pct_update(): Update functions for buf_LRU_old_ratio, innobase_old_blocks_pct. buf_page_peek_if_too_old(): Compare ut_time_ms() to bpage->access_time if buf_LRU_old_threshold_ms && bpage->old. Else observe buf_LRU_old_ratio and bpage->freed_page_clock. buf_pool_t: Add n_pages_made_young, n_pages_not_made_young, n_pages_made_young_old, n_pages_not_made_young, for statistics. buf_print(): Display buf_pool->n_pages_made_young, buf_pool->n_pages_not_made_young. This function is only for crash diagnostics. buf_print_io(): Display buf_pool->LRU_old_len and quantities derived from buf_pool->n_pages_made_young, buf_pool->n_pages_not_made_young. This function is invoked by SHOW ENGINE INNODB STATUS. rb://129 approved by Heikki Tuuri. This addresses Bug #45015.		2009-08-27 06:25:00 +00:00
..
buf0buddy.c	branches/zip: Add @file comments, and convert decorative	2009-05-25 09:52:29 +00:00
buf0buf.c	branches/zip: Replace the constant 3/8 ratio that controls the LRU_old	2009-08-27 06:25:00 +00:00
buf0flu.c	branches/zip	2009-07-13 17:04:57 +00:00
buf0lru.c	branches/zip: Replace the constant 3/8 ratio that controls the LRU_old	2009-08-27 06:25:00 +00:00
buf0rea.c	branches/zip: Replace the constant 3/8 ratio that controls the LRU_old	2009-08-27 06:25:00 +00:00