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mf_keycache.c, keycache.h:

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Fix for the resize key cache operation.
This commit is contained in:
igor@rurik.mysql.com
2003-11-25 10:40:14 -08:00
parent 4883d21b29
commit f6ca51feff
2 changed files with 193 additions and 33 deletions
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4
include/keycache.h
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@ -45,6 +45,8 @@ typedef struct st_keycache_wqueue
typedef struct st_key_cache
{
my_bool key_cache_inited;
my_bool resize_in_flush; /* true during flush of resize operation */
my_bool can_be_used; /* usage of cache for read/write is allowed */
uint key_cache_shift;
ulong key_cache_mem_size; /* specified size of the cache memory */
uint key_cache_block_size; /* size of the page buffer of a cache block */
@ -58,6 +60,7 @@ typedef struct st_key_cache
ulong blocks_used; /* number of currently used blocks */
ulong blocks_changed; /* number of currently dirty blocks */
ulong warm_blocks; /* number of blocks in warm sub-chain */
ulong cnt_for_resize_op; /* counter to block resize operation */
long blocks_available; /* number of blocks available in the LRU chain */
HASH_LINK **hash_root; /* arr. of entries into hash table buckets */
HASH_LINK *hash_link_root; /* memory for hash table links */
@ -67,6 +70,7 @@ typedef struct st_key_cache
BLOCK_LINK *used_last; /* ptr to the last block of the LRU chain */
BLOCK_LINK *used_ins; /* ptr to the insertion block in LRU chain */
pthread_mutex_t cache_lock; /* to lock access to the cache structure */
KEYCACHE_WQUEUE resize_queue; /* threads waiting during resize operation */
KEYCACHE_WQUEUE waiting_for_hash_link; /* waiting for a free hash link */
KEYCACHE_WQUEUE waiting_for_block; /* requests waiting for a free block */
BLOCK_LINK *changed_blocks[CHANGED_BLOCKS_HASH]; /* hash for dirty file bl.*/