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Post-review fixes.

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This commit is contained in:
Igor Babaev
2010-04-01 14:42:40 -07:00
parent ecba0ec8ed
commit 59baf97d56
5 changed files with 557 additions and 539 deletions
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89
include/keycache.h
View File

@ -37,7 +37,6 @@ C_MODE_START
#define MAX_KEY_CACHE_PARTITIONS 64 #define MAX_KEY_CACHE_PARTITIONS 64
/* The structure to get statistical data about a key cache */ /* The structure to get statistical data about a key cache */
typedef struct st_key_cache_statistics typedef struct st_key_cache_statistics
@ -53,6 +52,8 @@ typedef struct st_key_cache_statistics
ulonglong writes; /* number of actual writes from buffers into files */ ulonglong writes; /* number of actual writes from buffers into files */
} KEY_CACHE_STATISTICS; } KEY_CACHE_STATISTICS;
#define NO_LONG_KEY_CACHE_STAT_VARIABLES 3
/* The type of a key cache object */ /* The type of a key cache object */
typedef enum key_cache_type typedef enum key_cache_type
{ {
@ -61,6 +62,55 @@ typedef enum key_cache_type
} KEY_CACHE_TYPE; } KEY_CACHE_TYPE;
typedef
int (*INIT_KEY_CACHE)
(void *, uint key_cache_block_size,
size_t use_mem, uint division_limit, uint age_threshold);
typedef
int (*RESIZE_KEY_CACHE)
(void *, uint key_cache_block_size,
size_t use_mem, uint division_limit, uint age_threshold);
typedef
void (*CHANGE_KEY_CACHE_PARAM)
(void *keycache_cb,
uint division_limit, uint age_threshold);
typedef
uchar* (*KEY_CACHE_READ)
(void *keycache_cb,
File file, my_off_t filepos, int level,
uchar *buff, uint length,
uint block_length, int return_buffer);
typedef
int (*KEY_CACHE_INSERT)
(void *keycache_cb,
File file, my_off_t filepos, int level,
uchar *buff, uint length);
typedef
int (*KEY_CACHE_WRITE)
(void *keycache_cb,
File file, void *file_extra,
my_off_t filepos, int level,
uchar *buff, uint length,
uint block_length, int force_write);
typedef
int (*FLUSH_KEY_BLOCKS)
(void *keycache_cb,
int file, void *file_extra,
enum flush_type type);
typedef
int (*RESET_KEY_CACHE_COUNTERS)
(const char *name, void *keycache_cb);
typedef
void (*END_KEY_CACHE)
(void *keycache_cb, my_bool cleanup);
typedef
void (*GET_KEY_CACHE_STATISTICS)
(void *keycache_cb, uint partition_no,
KEY_CACHE_STATISTICS *key_cache_stats);
typedef
ulonglong (*GET_KEY_CACHE_STAT_VALUE)
(void *keycache_cb, uint var_no);
/* /*
An object of the type KEY_CACHE_FUNCS contains pointers to all functions An object of the type KEY_CACHE_FUNCS contains pointers to all functions
from the key cache interface. from the key cache interface.
@ -74,32 +124,17 @@ typedef enum key_cache_type
typedef struct st_key_cache_funcs typedef struct st_key_cache_funcs
{ {
int (*init) (void *, uint key_cache_block_size, INIT_KEY_CACHE init;
size_t use_mem, uint division_limit, uint age_threshold); RESIZE_KEY_CACHE resize;
int (*resize) (void *, uint key_cache_block_size, CHANGE_KEY_CACHE_PARAM change_param;
size_t use_mem, uint division_limit, uint age_threshold); KEY_CACHE_READ read;
void (*change_param) (void *keycache_cb, KEY_CACHE_INSERT insert;
uint division_limit, uint age_threshold); KEY_CACHE_WRITE write;
uchar* (*read) (void *keycache_cb, FLUSH_KEY_BLOCKS flush;
File file, my_off_t filepos, int level, RESET_KEY_CACHE_COUNTERS reset_counters;
uchar *buff, uint length, END_KEY_CACHE end;
uint block_length, int return_buffer); GET_KEY_CACHE_STATISTICS get_stats;
int (*insert) (void *keycache_cb, GET_KEY_CACHE_STAT_VALUE get_stat_val;
File file, my_off_t filepos, int level,
uchar *buff, uint length);
int (*write) (void *keycache_cb,
File file, void *file_extra,
my_off_t filepos, int level,
uchar *buff, uint length,
uint block_length, int force_write);
int (*flush) (void *keycache_cb,
int file, void *file_extra,
enum flush_type type);
int (*reset_counters) (const char *name, void *keycache_cb);
void (*end) (void *keycache_cb, my_bool cleanup);
void (*get_stats) (void *keycache_cb, uint partition_no,
KEY_CACHE_STATISTICS *key_cache_stats);
ulonglong (*get_stat_val) (void *keycache_cb, uint var_no);
} KEY_CACHE_FUNCS; } KEY_CACHE_FUNCS;

32
mysql-test/r/key_cache.result
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@ -672,12 +672,12 @@ insert into t2 values (2000, 3, 'yyyy');
select * from information_schema.key_caches where key_cache_name like "keycache2" select * from information_schema.key_caches where key_cache_name like "keycache2"
and partition_number is null; and partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
keycache2 NULL NULL 1048576 1024 0 # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3
select * from information_schema.key_caches where key_cache_name like "key%" select * from information_schema.key_caches where key_cache_name like "key%"
and partition_number is null; and partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19 keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19
keycache2 NULL NULL 1048576 1024 0 # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3
cache index t2 in keycache1; cache index t2 in keycache1;
Table Op Msg_type Msg_text Table Op Msg_type Msg_text
test.t2 assign_to_keycache status OK test.t2 assign_to_keycache status OK
@ -718,7 +718,7 @@ KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUS
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 7 NULL 262143 2048 # # 0 3201 43 1594 30 keycache1 7 NULL 262143 2048 # # 0 3201 43 1594 30
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=2*1024; set global keycache1.key_cache_block_size=2*1024;
insert into t2 values (7000, 3, 'yyyy'); insert into t2 values (7000, 3, 'yyyy');
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
@ -726,66 +726,72 @@ KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUS
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 7 NULL 262143 2048 # # 0 6 6 3 3 keycache1 7 NULL 262143 2048 # # 0 6 6 3 3
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=8*1024; set global keycache1.key_cache_block_size=8*1024;
select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 3 NULL 262143 8192 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
insert into t2 values (8000, 3, 'yyyy'); insert into t2 values (8000, 3, 'yyyy');
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 3 NULL 262143 8192 # # 0 6 5 3 3 keycache1 3 NULL 262143 8192 # # 0 6 5 3 3
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_buffer_size=64*1024; set global keycache1.key_buffer_size=64*1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=2*1024; set global keycache1.key_cache_block_size=2*1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 3 NULL 65535 2048 # # 0 0 0 0 0 keycache1 3 NULL 65535 2048 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=8*1024; set global keycache1.key_cache_block_size=8*1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_buffer_size=0; set global keycache1.key_buffer_size=0;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=8*1024; set global keycache1.key_cache_block_size=8*1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_buffer_size=0; set global keycache1.key_buffer_size=0;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_buffer_size=128*1024; set global keycache1.key_buffer_size=128*1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 1 NULL 131072 8192 # # 0 0 0 0 0 keycache1 1 NULL 131072 8192 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
set global keycache1.key_cache_block_size=1024; set global keycache1.key_cache_block_size=1024;
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
default 2 NULL 32768 1024 # # 0 3172 24 1552 18 default 2 NULL 32768 1024 # # 0 3172 24 1552 18
small NULL NULL 1048576 1024 # # 0 0 0 0 0 small NULL NULL 1048576 1024 # # 0 0 0 0 0
keycache1 7 NULL 131068 1024 # # 0 0 0 0 0 keycache1 7 NULL 131068 1024 # # 0 0 0 0 0
keycache2 NULL NULL 1048576 1024 # # 0 0 0 0 0 keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
drop table t1,t2; drop table t1,t2;
set global keycache1.key_buffer_size=0; set global keycache1.key_buffer_size=0;
set global keycache2.key_buffer_size=0; set global keycache2.key_buffer_size=0;

2
mysql-test/t/key_cache.test
View File

@ -469,6 +469,8 @@ insert into t2 values (7000, 3, 'yyyy');
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;
set global keycache1.key_cache_block_size=8*1024; set global keycache1.key_cache_block_size=8*1024;
--replace_column 6 # 7 #
select * from information_schema.key_caches where partition_number is null;
insert into t2 values (8000, 3, 'yyyy'); insert into t2 values (8000, 3, 'yyyy');
--replace_column 6 # 7 # --replace_column 6 # 7 #
select * from information_schema.key_caches where partition_number is null; select * from information_schema.key_caches where partition_number is null;

944
mysys/mf_keycache.c
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File diff suppressed because it is too large Load Diff

29
sql/sql_show.cc
View File

@ -2235,8 +2235,9 @@ static void update_key_cache_stat_var(KEY_CACHE *key_cache, size_t ofs)
case offsetof(KEY_CACHE, global_cache_read): case offsetof(KEY_CACHE, global_cache_read):
case offsetof(KEY_CACHE, global_cache_w_requests): case offsetof(KEY_CACHE, global_cache_w_requests):
case offsetof(KEY_CACHE, global_cache_write): case offsetof(KEY_CACHE, global_cache_write):
var_no= 3+(ofs-offsetof(KEY_CACHE, global_cache_w_requests))/ var_no= NO_LONG_KEY_CACHE_STAT_VARIABLES +
sizeof(ulonglong); (ofs-offsetof(KEY_CACHE, global_cache_w_requests))/
sizeof(ulonglong);
*(ulonglong *)((char *) key_cache + ofs)= *(ulonglong *)((char *) key_cache + ofs)=
get_key_cache_stat_value(key_cache, var_no); get_key_cache_stat_value(key_cache, var_no);
break; break;
@ -6643,13 +6644,13 @@ int store_key_cache_table_record(THD *thd, TABLE *table,
KEY_CACHE *key_cache, KEY_CACHE *key_cache,
uint partitions, uint partition_no) uint partitions, uint partition_no)
{ {
KEY_CACHE_STATISTICS key_cache_stats; KEY_CACHE_STATISTICS keycache_stats;
uint err; uint err;
DBUG_ENTER("store_key_cache_table_record"); DBUG_ENTER("store_key_cache_table_record");
get_key_cache_statistics(key_cache, partition_no, &key_cache_stats); get_key_cache_statistics(key_cache, partition_no, &keycache_stats);
if (key_cache_stats.mem_size == 0) if (!key_cache->key_cache_inited || keycache_stats.mem_size == 0)
DBUG_RETURN(0); DBUG_RETURN(0);
restore_record(table, s->default_values); restore_record(table, s->default_values);
@ -6669,15 +6670,15 @@ int store_key_cache_table_record(THD *thd, TABLE *table,
table->field[2]->set_notnull(); table->field[2]->set_notnull();
table->field[2]->store((long) partition_no, TRUE); table->field[2]->store((long) partition_no, TRUE);
} }
table->field[3]->store(key_cache_stats.mem_size, TRUE); table->field[3]->store(keycache_stats.mem_size, TRUE);
table->field[4]->store(key_cache_stats.block_size, TRUE); table->field[4]->store(keycache_stats.block_size, TRUE);
table->field[5]->store(key_cache_stats.blocks_used, TRUE); table->field[5]->store(keycache_stats.blocks_used, TRUE);
table->field[6]->store(key_cache_stats.blocks_unused, TRUE); table->field[6]->store(keycache_stats.blocks_unused, TRUE);
table->field[7]->store(key_cache_stats.blocks_changed, TRUE); table->field[7]->store(keycache_stats.blocks_changed, TRUE);
table->field[8]->store(key_cache_stats.read_requests, TRUE); table->field[8]->store(keycache_stats.read_requests, TRUE);
table->field[9]->store(key_cache_stats.reads, TRUE); table->field[9]->store(keycache_stats.reads, TRUE);
table->field[10]->store(key_cache_stats.write_requests, TRUE); table->field[10]->store(keycache_stats.write_requests, TRUE);
table->field[11]->store(key_cache_stats.writes, TRUE); table->field[11]->store(keycache_stats.writes, TRUE);
err= schema_table_store_record(thd, table); err= schema_table_store_record(thd, table);
DBUG_RETURN(err); DBUG_RETURN(err);