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/*****************************************************************************
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Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved.
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Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2008, Google Inc.
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Portions of this file contain modifications contributed and copyrighted by
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/********************************************************************//**
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Tells if a block is still close enough to the MRU end of the LRU list
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meaning that it is not in danger of getting evicted and also implying
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that it has been accessed recently.
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Note that this is for heuristics only and does not reserve buffer pool
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@return TRUE if block is close to MRU end of LRU */
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buf_page_peek_if_young(
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/*===================*/
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const buf_page_t* bpage) /*!< in: block */
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/* FIXME: bpage->freed_page_clock is 31 bits */
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return((buf_pool->freed_page_clock & ((1UL << 31) - 1))
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< ((ulint) bpage->freed_page_clock
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+ (buf_pool->curr_size
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* (BUF_LRU_OLD_RATIO_DIV - buf_LRU_old_ratio)
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/ (BUF_LRU_OLD_RATIO_DIV * 4))));
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/********************************************************************//**
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Recommends a move of a block to the start of the LRU list if there is danger
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of dropping from the buffer pool. NOTE: does not reserve the buffer pool
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buf_pool->stat.n_pages_not_made_young++;
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/* FIXME: bpage->freed_page_clock is 31 bits */
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return((buf_pool->freed_page_clock & ((1UL << 31) - 1))
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> ((ulint) bpage->freed_page_clock
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+ (buf_pool->curr_size
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* (BUF_LRU_OLD_RATIO_DIV - buf_LRU_old_ratio)
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/ (BUF_LRU_OLD_RATIO_DIV * 4))));
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return(!buf_page_peek_if_young(bpage));
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/********************************************************************//**
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Allocates a buf_page_t descriptor. This function must succeed. In case
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of failure we assert in this function.
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@return: the allocated descriptor. */
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buf_page_alloc_descriptor(void)
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/*===========================*/
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bpage = (buf_page_t*) ut_malloc(sizeof *bpage);
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ut_d(memset(bpage, 0, sizeof *bpage));
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UNIV_MEM_ALLOC(bpage, sizeof *bpage);
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/********************************************************************//**
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Free a buf_page_t descriptor. */
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buf_page_free_descriptor(
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/*=====================*/
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buf_page_t* bpage) /*!< in: bpage descriptor to free. */
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/********************************************************************//**
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Allocates a buffer block.
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@return own: the allocated block, in state BUF_BLOCK_MEMORY */
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ulint zip_size) /*!< in: compressed page size in bytes,
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or 0 if uncompressed tablespace */
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buf_block_alloc(void)
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/*=================*/
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buf_block_t* block;
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block = buf_LRU_get_free_block(zip_size);
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block = buf_LRU_get_free_block();
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buf_block_set_state(block, BUF_BLOCK_MEMORY);
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where we have acquired latch */
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ulint level) /*!< in: latching order level */
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sync_thread_add_level(&block->lock, level);
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sync_thread_add_level(&block->lock, level, FALSE);
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#endif /* UNIV_SYNC_DEBUG */
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#endif /* !UNIV_HOTBACKUP */
added
removed
storage/innodb_plugin/include/buf0buf.ic
