Merge tkatchaounov@bk-internal.mysql.com:/home/bk/mysql-4.1 (17c49b61) · Commits · Software / OSDI20 Artifacts / mariadb

include/keycache.h

+4 −1

Original line number	Diff line number	Diff line
		@@ -88,12 +88,13 @@ typedef struct st_key_cache
		ulong param_division_limit; /* min. percentage of warm blocks */
		ulong param_age_threshold; /* determines when hot block is downgraded */

		/* Statistics variables */
		/* Statistics variables. These are reset in reset_key_cache_counters(). */
		ulong global_blocks_changed; /* number of currently dirty blocks */
		ulong global_cache_w_requests;/* number of write requests (write hits) */
		ulong global_cache_write; /* number of writes from the cache to files */
		ulong global_cache_r_requests;/* number of read requests (read hits) */
		ulong global_cache_read; /* number of reads from files to the cache */

		int blocks; /* max number of blocks in the cache */
		my_bool in_init; /* Set to 1 in MySQL during init/resize */
		} KEY_CACHE;
		@@ -132,5 +133,7 @@ extern my_bool multi_key_cache_set(const byte *key, uint length,
		KEY_CACHE *key_cache);
		extern void multi_key_cache_change(KEY_CACHE *old_data,
		KEY_CACHE *new_data);
		extern int reset_key_cache_counters(const char *name,
		KEY_CACHE *key_cache);
		C_MODE_END
		#endif /* _keycache_h */

mysys/mf_keycache.c

+35 −0

Original line number	Diff line number	Diff line
		@@ -2444,6 +2444,41 @@ static int flush_all_key_blocks(KEY_CACHE *keycache)
		}


		/*
		Reset the counters of a key cache.

		SYNOPSIS
		reset_key_cache_counters()
		name the name of a key cache
		key_cache pointer to the key kache to be reset

		DESCRIPTION
		This procedure is used by process_key_caches() to reset the counters of all
		currently used key caches, both the default one and the named ones.

		RETURN
		0 on success (always because it can't fail)
		*/

		int reset_key_cache_counters(const char name, KEY_CACHE key_cache)
		{
		DBUG_ENTER("reset_key_cache_counters");
		if (!key_cache->key_cache_inited)
		{
		DBUG_PRINT("info", ("Key cache %s not initialized.", name));
		DBUG_RETURN(0);
		}
		DBUG_PRINT("info", ("Resetting counters for key cache %s.", name));

		key_cache->global_blocks_changed= 0; /* Key_blocks_not_flushed */
		key_cache->global_cache_r_requests= 0; /* Key_read_requests */
		key_cache->global_cache_read= 0; /* Key_reads */
		key_cache->global_cache_w_requests= 0; /* Key_write_requests */
		key_cache->global_cache_write= 0; /* Key_writes */
		DBUG_RETURN(0);
		}


		#ifndef DBUG_OFF
		/*
		Test if disk-cache is ok

sql/mysql_priv.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -938,7 +938,6 @@ extern SHOW_COMP_OPTION have_ndbcluster;
		extern struct system_variables global_system_variables;
		extern struct system_variables max_system_variables;
		extern struct rand_struct sql_rand;
		extern KEY_CACHE *sql_key_cache;

		extern const char *opt_date_time_formats[];
		extern KNOWN_DATE_TIME_FORMAT known_date_time_formats[];

sql/mysqld.cc

+5 −8

Original line number	Diff line number	Diff line
		@@ -383,7 +383,6 @@ struct system_variables max_system_variables;

		MY_TMPDIR mysql_tmpdir_list;
		MY_BITMAP temp_pool;
		KEY_CACHE *sql_key_cache;

		CHARSET_INFO system_charset_info, files_charset_info ;
		CHARSET_INFO national_charset_info, table_alias_charset;
		@@ -1846,14 +1845,14 @@ We will try our best to scrape up some info that will hopefully help diagnose\n\
		the problem, but since we have already crashed, something is definitely wrong\n\
		and this may fail.\n\n");
		fprintf(stderr, "key_buffer_size=%lu\n",
		(ulong) sql_key_cache->key_cache_mem_size);
		(ulong) dflt_key_cache->key_cache_mem_size);
		fprintf(stderr, "read_buffer_size=%ld\n", global_system_variables.read_buff_size);
		fprintf(stderr, "max_used_connections=%ld\n", max_used_connections);
		fprintf(stderr, "max_connections=%ld\n", max_connections);
		fprintf(stderr, "threads_connected=%d\n", thread_count);
		fprintf(stderr, "It is possible that mysqld could use up to \n\
		key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = %ld K\n\
		bytes of memory\n", ((ulong) sql_key_cache->key_cache_mem_size +
		bytes of memory\n", ((ulong) dflt_key_cache->key_cache_mem_size +
		(global_system_variables.read_buff_size +
		global_system_variables.sortbuff_size) *
		max_connections)/ 1024);
		@@ -2120,12 +2119,12 @@ extern "C" void signal_hand(void arg __attribute__((unused)))
		case SIGHUP:
		if (!abort_loop)
		{
		mysql_print_status((THD*) 0); // Print some debug info
		reload_acl_and_cache((THD*) 0,
		(REFRESH_LOG \| REFRESH_TABLES \| REFRESH_FAST \|
		REFRESH_STATUS \| REFRESH_GRANT \|
		REFRESH_THREADS \| REFRESH_HOSTS),
		(TABLE_LIST*) 0, NULL); // Flush logs
		mysql_print_status((THD*) 0); // Send debug some info
		}
		break;
		#ifdef USE_ONE_SIGNAL_HAND
		@@ -2699,8 +2698,6 @@ server.");

		/* call ha_init_key_cache() on all key caches to init them */
		process_key_caches(&ha_init_key_cache);
		/* We must set dflt_key_cache in case we are using ISAM tables */
		dflt_key_cache= sql_key_cache;

		#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT) && !defined(EMBEDDED_LIBRARY)
		if (locked_in_memory && !getuid())
		@@ -5598,10 +5595,10 @@ static void mysql_init_variables(void)
		threads.empty();
		thread_cache.empty();
		key_caches.empty();
		multi_keycache_init();
		if (!(sql_key_cache= get_or_create_key_cache(default_key_cache_base.str,
		if (!(dflt_key_cache= get_or_create_key_cache(default_key_cache_base.str,
		default_key_cache_base.length)))
		exit(1);
		multi_keycache_init(); /* set key_cache_hash.default_value = dflt_key_cache */

		/* Initialize structures that is used when processing options */
		replicate_rewrite_db.empty();

sql/set_var.cc

+2 −2

Original line number	Diff line number	Diff line
		@@ -2174,7 +2174,7 @@ bool sys_var_key_buffer_size::update(THD thd, set_var var)

		if (!tmp) // Zero size means delete
		{
		if (key_cache == sql_key_cache)
		if (key_cache == dflt_key_cache)
		goto end; // Ignore default key cache

		if (key_cache->key_cache_inited) // If initied
		@@ -2188,7 +2188,7 @@ bool sys_var_key_buffer_size::update(THD thd, set_var var)
		base_name->length, &list);
		key_cache->in_init= 1;
		pthread_mutex_unlock(&LOCK_global_system_variables);
		error= reassign_keycache_tables(thd, key_cache, sql_key_cache);
		error= reassign_keycache_tables(thd, key_cache, dflt_key_cache);
		pthread_mutex_lock(&LOCK_global_system_variables);
		key_cache->in_init= 0;
		}