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bool in_resize; /* true during resize operation */
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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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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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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 */