diff options
| -rw-r--r-- | sql/sql_cache.cc | 19 | ||||
| -rw-r--r-- | sql/sql_cache.h | 1 |
2 files changed, 19 insertions, 1 deletions
diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc index c8f18556d50..d46df21bfcf 100644 --- a/sql/sql_cache.cc +++ b/sql/sql_cache.cc @@ -329,6 +329,9 @@ TODO list: */ #include "mariadb.h" /* NO_EMBEDDED_ACCESS_CHECKS */ +#if defined(DBUG_OFF) && defined(HAVE_MADVISE) +#include <sys/mman.h> +#endif #include "sql_priv.h" #include "sql_basic_types.h" #include "sql_cache.h" @@ -2591,7 +2594,7 @@ size_t Query_cache::init_cache() { size_t mem_bin_count, num, step; size_t mem_bin_size, prev_size, inc; - size_t additional_data_size, max_mem_bin_size, approx_additional_data_size; + size_t max_mem_bin_size, approx_additional_data_size; int align; DBUG_ENTER("Query_cache::init_cache"); @@ -2656,6 +2659,13 @@ size_t Query_cache::init_cache() if (!(cache= (uchar *) my_malloc_lock(query_cache_size+additional_data_size, MYF(0)))) goto err; +#if defined(DBUG_OFF) && defined(HAVE_MADVISE) && defined(MADV_DONTDUMP) + if (madvise(cache, query_cache_size+additional_data_size, MADV_DONTDUMP)) + { + DBUG_PRINT("warning", ("coudn't mark query cache memory as MADV_DONTDUMP: %s", + strerror(errno))); + } +#endif DBUG_PRINT("qcache", ("cache length %zu, min unit %zu, %zu bins", query_cache_size, min_allocation_unit, mem_bin_num)); @@ -2818,6 +2828,13 @@ void Query_cache::free_cache() } while (block != queries_blocks); } +#if defined(DBUG_OFF) && defined(HAVE_MADVISE) && defined(MADV_DODUMP) + if (madvise(cache, query_cache_size+additional_data_size, MADV_DODUMP)) + { + DBUG_PRINT("warning", ("coudn't mark query cache memory as MADV_DODUMP: %s", + strerror(errno))); + } +#endif my_free(cache); make_disabled(); my_hash_free(&queries); diff --git a/sql/sql_cache.h b/sql/sql_cache.h index eb046b4d167..0ed45a9ed81 100644 --- a/sql/sql_cache.h +++ b/sql/sql_cache.h @@ -337,6 +337,7 @@ protected: till the end of a flush operation. */ mysql_mutex_t structure_guard_mutex; + size_t additional_data_size; uchar *cache; // cache memory Query_cache_block *first_block; // physical location block list Query_cache_block *queries_blocks; // query list (LIFO) |