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bool resize_in_flush; /* true during flush of resize operation */
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bool can_be_used; /* usage of cache for read/write is allowed */
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size_t key_cache_mem_size; /* specified size of the cache memory */
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uint key_cache_block_size; /* size of the page buffer of a cache block */
68
uint32_t key_cache_block_size; /* size of the page buffer of a cache block */
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ulong min_warm_blocks; /* min number of warm blocks; */
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ulong age_threshold; /* age threshold for hot blocks */
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uint64_t keycache_time; /* total number of block link operations */
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uint hash_entries; /* max number of entries in the hash table */
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uint32_t hash_entries; /* max number of entries in the hash table */
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int hash_links; /* max number of hash links */
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int hash_links_used; /* number of hash links currently used */
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int disk_blocks; /* max number of blocks in the cache */
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HASH_LINK *free_hash_list; /* list of free hash links */
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BLOCK_LINK *free_block_list; /* list of free blocks */
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BLOCK_LINK *block_root; /* memory for block links */
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uchar *block_mem; /* memory for block buffers */
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unsigned char *block_mem; /* memory for block buffers */
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BLOCK_LINK *used_last; /* ptr to the last block of the LRU chain */
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BLOCK_LINK *used_ins; /* ptr to the insertion block in LRU chain */
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pthread_mutex_t cache_lock; /* to lock access to the cache structure */
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/* The default key cache */
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extern KEY_CACHE dflt_key_cache_var, *dflt_key_cache;
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extern int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
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size_t use_mem, uint division_limit,
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extern int resize_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
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size_t use_mem, uint division_limit,
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extern void change_key_cache_param(KEY_CACHE *keycache, uint division_limit,
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extern uchar *key_cache_read(KEY_CACHE *keycache,
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extern int init_key_cache(KEY_CACHE *keycache, uint32_t key_cache_block_size,
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size_t use_mem, uint32_t division_limit,
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uint32_t age_threshold);
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extern int resize_key_cache(KEY_CACHE *keycache, uint32_t key_cache_block_size,
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size_t use_mem, uint32_t division_limit,
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uint32_t age_threshold);
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extern void change_key_cache_param(KEY_CACHE *keycache, uint32_t division_limit,
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uint32_t age_threshold);
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extern unsigned char *key_cache_read(KEY_CACHE *keycache,
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File file, my_off_t filepos, int level,
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uchar *buff, uint length,
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uint block_length,int return_buffer);
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unsigned char *buff, uint32_t length,
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uint32_t block_length,int return_buffer);
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extern int key_cache_insert(KEY_CACHE *keycache,
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File file, my_off_t filepos, int level,
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uchar *buff, uint length);
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unsigned char *buff, uint32_t length);
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extern int key_cache_write(KEY_CACHE *keycache,
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File file, my_off_t filepos, int level,
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uchar *buff, uint length,
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uint block_length,int force_write);
143
unsigned char *buff, uint32_t length,
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uint32_t block_length,int force_write);
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extern int flush_key_blocks(KEY_CACHE *keycache,
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int file, enum flush_type type);
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extern void end_key_cache(KEY_CACHE *keycache, bool cleanup);
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/* Functions to handle multiple key caches */
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extern bool multi_keycache_init(void);
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extern void multi_keycache_free(void);
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extern KEY_CACHE *multi_key_cache_search(uchar *key, uint length);
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extern bool multi_key_cache_set(const uchar *key, uint length,
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extern KEY_CACHE *multi_key_cache_search(unsigned char *key, uint32_t length);
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extern bool multi_key_cache_set(const unsigned char *key, uint32_t length,
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KEY_CACHE *key_cache);
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extern void multi_key_cache_change(KEY_CACHE *old_data,
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KEY_CACHE *new_data);
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extern int reset_key_cache_counters(const char *name,
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KEY_CACHE *key_cache);
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#endif /* _keycache_h */
added
removed
storage/myisam/keycache.h
