Here's the whole the query, table structure, table
length and show variables output:
mysql> desc summary;
+-------------------------+------------------+------+-----+---------------------+----------------+
| Field | Type | Null |
Key | Default | Extra |
+-------------------------+------------------+------+-----+---------------------+----------------+
| id | int(10) unsigned | |
PRI | NULL | auto_increment |
| host_id | int(10) unsigned | |
MUL | 0 | |
| alias_domain_id | int(10) unsigned | YES |
MUL | NULL | |
| domain_id | int(10) unsigned | YES |
MUL | NULL | |
| alias_id | int(10) unsigned | YES |
MUL | NULL | |
| sender_domain_id | int(10) unsigned | YES |
MUL | NULL | |
| sender_alias_id | int(10) unsigned | YES |
MUL | NULL | |
| time | datetime | |
MUL | 0000-00-00 00:00:00 | |
| val1 | int(10) unsigned | |
| 0 | |
| val2 | int(10) unsigned | |
| 0 | |
| processed | int(10) unsigned | |
| 0 | |
+-------------------------+------------------+------+-----+---------------------+----------------+
select count(*) from summary;
+----------+
| count(*) |
+----------+
| 34759085 |
+----------+
1 row in set (0.05 sec)
Query:
create temporary table tmp (PRIMARY
KEY(alias_id,domain_id))
select
alias_id,
domain_id,
sum(val1) rank
from summary
where 1=1
and time >= '2004-11-01 11:00:00'
and time <= '2004-11-09 11:00:00'
group by 1, 2
order by rank desc
limit 5
'show variables;' output:
Variable_name Value
back_log 50
basedir /opt/mysql-pro-4.0.16/
binlog_cache_size 32768
bulk_insert_buffer_size 8388608
character_set latin1
character_sets latin1 big5 czech euc_kr gb2312 gbk
latin1_de sjis tis620 ujis dec8 dos german1 hp8
koi8_ru latin2 swe7 usa7 cp1251 danish hebrew win1251
estonia hungarian koi8_ukr win1251ukr greek win1250
croat cp1257 latin5
concurrent_insert ON
connect_timeout 5
convert_character_set
datadir /opt/mysql-pro-4.0.16/data/
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
flush OFF
flush_time 0
ft_boolean_syntax + -><()~*:""&|
ft_min_word_len 4
ft_max_word_len 254
ft_max_word_len_for_sort 20
ft_stopword_file (built-in)
have_bdb NO
have_crypt YES
have_innodb YES
have_isam YES
have_raid NO
have_symlink YES
have_openssl NO
have_query_cache YES
init_file
innodb_additional_mem_pool_size 1048576
innodb_buffer_pool_size 8388608
innodb_data_file_path ibdata1:10M:autoextend
innodb_data_home_dir
innodb_file_io_threads 4
innodb_force_recovery 0
innodb_thread_concurrency 8
innodb_flush_log_at_trx_commit 1
innodb_fast_shutdown ON
innodb_flush_method
innodb_lock_wait_timeout 50
innodb_log_arch_dir ./
innodb_log_archive OFF
innodb_log_buffer_size 1048576
innodb_log_file_size 5242880
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_mirrored_log_groups 1
innodb_max_dirty_pages_pct 90
interactive_timeout 28800
join_buffer_size 131072
key_buffer_size 134217728
language
/opt/mysql-pro-4.0.16/share/mysql/english/
large_files_support ON
local_infile ON
locked_in_memory OFF
log ON
log_update OFF
log_bin OFF
log_slave_updates OFF
log_slow_queries OFF
log_warnings OFF
long_query_time 10
low_priority_updates OFF
lower_case_table_names OFF
max_allowed_packet 1048576
max_binlog_cache_size 4294967295
max_binlog_size 1073741824
max_connections 100
max_connect_errors 10
max_delayed_threads 20
max_heap_table_size 16777216
max_join_size 4294967295
max_relay_log_size 0
max_seeks_for_key 4294967295
max_sort_length 1024
max_user_connections 0
max_tmp_tables 32
max_write_lock_count 4294967295
myisam_max_extra_sort_file_size 268435456
myisam_max_sort_file_size 2147483647
myisam_repair_threads 1
myisam_recover_options OFF
myisam_sort_buffer_size 8388608
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
open_files_limit 1024
pid_file
/opt/mysql-pro-4.0.16/data/testsystem.pid
log_error
port 3306
protocol_version 10
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_size 0
query_cache_type ON
query_prealloc_size 8192
range_alloc_block_size 2048
read_buffer_size 131072
read_only OFF
read_rnd_buffer_size 262144
rpl_recovery_rank 0
server_id 0
slave_net_timeout 3600
skip_external_locking ON
skip_networking OFF
skip_show_database OFF
slow_launch_time 2
socket /tmp/mysql.sock
sort_buffer_size 2097144
sql_mode 0
table_cache 64
table_type MYISAM
thread_cache_size 0
thread_stack 126976
tx_isolation REPEATABLE-READ
timezone PST
tmp_table_size 209715200
tmpdir /tmp/
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
version 4.0.16-pro-log
wait_timeout 28800
--- Mark Maunder <[EMAIL PROTECTED]> wrote:
> Please include the full query you're running, the
> table structure, and
> the number of rows in the table. A dump of 'show
> variables;' would be
> helpful too.
>
> On Wed, 2004-11-10 at 21:44, foo bar wrote:
> > Hi Everyone,
> >
> > I've been Googling unsuccessfully for specific
> issues
> > relating to queries run on MySQL version 4.0.16
> > against "tmp" tables. I have witnessed several
> > occurrences where queries running on various
> platforms
> > hang in a "Copying to tmp table" state for hours
> or
> > days at a time. When the same query is manually
> run
> > from the MySQL command line client, the query
> returns,
> > even on very large tables. Could someone please
> give
> > me a hint as to possible tuning (or upgrade?)
> ideas to
> > fix this situation? I can't find anything else on
> > each problem system that would give me a hint as
> to
> > why this problem randomly occurs. I've made
> attempts
> > at adjusting the "tmp_table_size" limits to have
> the
> > system try to do "order by" queries in memory, but
> > this does not seem to help the situation.
> >
> > Any help would be appreciated!
> >
> > -Kevin
> >
> > "show full processlist" output (notice that the
> query
> > has been running for 7.9 days!!!):
> > | 33 | someuser | localhost:34329 | sometable |
> Query
> > | 687465
> > | Copying to tmp table | select
> > date_add( date_format(time, '%Y-%c-%d
> 00:00:00'),
> > INTERVAL 0 HOUR) time,
> > ...
> > group by 1
> > order by 1
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Check out the new Yahoo! Front Page.
> > www.yahoo.com
>
>
>
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