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From:HMax Date:February 17 2005 3:30pm
Subject:Re: LOAD INDEX INTO CACHE problem
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Hello there.

OK I'll paste the results of commands you asked right after my reply,
because we found out where the problem comes from.
The myisamchk command showed that the index on the VarChar has a block
size of 2048 instead of 1024. However, when I turn this index to a
FULLTEXT one, the block size is back to 1024, and the LOAD INDEX INTO
CACHE works.

Now this is a problem because our huge table needs both our FULLTEXT
indexes and some on VARCHAR fields too. At least we know where it
comes from. Now, is there a fast solution ? We were waiting for this
bug correction to study a release date for our application :/

Thank you, and here is the results :


SHOW CREATE TABLE 
`tbltest`;


CREATE TABLE `tbltest` (
  `testid` int(10) unsigned NOT NULL auto_increment,
  `testvalue` varchar(100) NOT NULL default '',
  PRIMARY KEY  (`testid`),
  KEY `BOB` (`testvalue`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8


SHOW VARIABLES;

+---------------------------------+---------------------------------+
| Variable_name                   | Value                           |
+---------------------------------+---------------------------------+
| back_log                        | 50                              |
| basedir                         | D:\mysql\4.1\                   |
| binlog_cache_size               | 32768                           |
| bulk_insert_buffer_size         | 8388608                         |
| character_set_client            | utf8                            |
| character_set_connection        | utf8                            |
| character_set_database          | utf8                            |
| character_set_results           | utf8                            |
| character_set_server            | utf8                            |
| character_set_system            | utf8                            |
| character_sets_dir              | D:\mysql\4.1\share\charsets/    |
| collation_connection            | utf8_general_ci                 |
| collation_database              | utf8_general_ci                 |
| collation_server                | utf8_general_ci                 |
| concurrent_insert               | ON                              |
| connect_timeout                 | 5                               |
| datadir                         | D:\mysql\4.1\Data\              |
| date_format                     | %Y-%m-%d                        |
| datetime_format                 | %Y-%m-%d %H:%i:%s               |
| default_week_format             | 0                               |
| delay_key_write                 | ON                              |
| delayed_insert_limit            | 100                             |
| delayed_insert_timeout          | 300                             |
| delayed_queue_size              | 1000                            |
| expire_logs_days                | 0                               |
| flush                           | OFF                             |
| flush_time                      | 1800                            |
| ft_boolean_syntax               | + -><()~*:""&|                  |
| ft_max_word_len                 | 84                              |
| ft_min_word_len                 | 4                               |
| ft_query_expansion_limit        | 20                              |
| ft_stopword_file                | (built-in)                      |
| group_concat_max_len            | 1024                            |
| have_archive                    | NO                              |
| have_bdb                        | NO                              |
| have_compress                   | YES                             |
| have_crypt                      | NO                              |
| have_csv                        | NO                              |
| have_example_engine             | NO                              |
| have_geometry                   | YES                             |
| have_innodb                     | DISABLED                        |
| have_isam                       | NO                              |
| have_ndbcluster                 | NO                              |
| have_openssl                    | NO                              |
| have_query_cache                | YES                             |
| have_raid                       | NO                              |
| have_rtree_keys                 | YES                             |
| have_symlink                    | YES                             |
| init_connect                    |                                 |
| init_file                       |                                 |
| init_slave                      |                                 |
| innodb_additional_mem_pool_size | 2097152                         |
| innodb_autoextend_increment     | 8                               |
| innodb_buffer_pool_awe_mem_mb   | 0                               |
| innodb_buffer_pool_size         | 8388608                         |
| innodb_data_file_path           |                                 |
| innodb_data_home_dir            |                                 |
| innodb_fast_shutdown            | ON                              |
| innodb_file_io_threads          | 4                               |
| innodb_file_per_table           | OFF                             |
| innodb_flush_log_at_trx_commit  | 1                               |
| innodb_flush_method             |                                 |
| innodb_force_recovery           | 0                               |
| innodb_lock_wait_timeout        | 50                              |
| innodb_locks_unsafe_for_binlog  | OFF                             |
| innodb_log_arch_dir             |                                 |
| innodb_log_archive              | OFF                             |
| innodb_log_buffer_size          | 1048576                         |
| innodb_log_file_size            | 10485760                        |
| innodb_log_files_in_group       | 2                               |
| innodb_log_group_home_dir       |                                 |
| innodb_max_dirty_pages_pct      | 90                              |
| innodb_max_purge_lag            | 0                               |
| innodb_mirrored_log_groups      | 1                               |
| innodb_open_files               | 300                             |
| innodb_table_locks              | ON                              |
| innodb_thread_concurrency       | 8                               |
| interactive_timeout             | 28800                           |
| join_buffer_size                | 131072                          |
| key_buffer_size                 | 10485760                        |
| key_cache_age_threshold         | 300                             |
| key_cache_block_size            | 1024                            |
| key_cache_division_limit        | 100                             |
| language                        | D:\mysql\4.1\share\english\     |
| large_files_support             | ON                              |
| license                         | GPL                             |
| local_infile                    | ON                              |
| log                             | OFF                             |
| log_bin                         | OFF                             |
| log_error                       | .\testserver.err                |
| log_slave_updates               | OFF                             |
| log_slow_queries                | OFF                             |
| log_update                      | OFF                             |
| log_warnings                    | 1                               |
| long_query_time                 | 10                              |
| low_priority_updates            | OFF                             |
| lower_case_file_system          | OFF                             |
| lower_case_table_names          | 1                               |
| max_allowed_packet              | 1048576                         |
| max_binlog_cache_size           | 4294967295                      |
| max_binlog_size                 | 1073741824                      |
| max_connect_errors              | 10                              |
| max_connections                 | 100                             |
| max_delayed_threads             | 20                              |
| max_error_count                 | 64                              |
| max_heap_table_size             | 16777216                        |
| max_insert_delayed_threads      | 20                              |
| max_join_size                   | 4294967295                      |
| max_length_for_sort_data        | 1024                            |
| max_relay_log_size              | 0                               |
| max_seeks_for_key               | 4294967295                      |
| max_sort_length                 | 1024                            |
| max_tmp_tables                  | 32                              |
| max_user_connections            | 0                               |
| max_write_lock_count            | 4294967295                      |
| myisam_data_pointer_size        | 4                               |
| myisam_max_extra_sort_file_size | 107374182400                    |
| myisam_max_sort_file_size       | 107374182400                    |
| myisam_recover_options          | OFF                             |
| myisam_repair_threads           | 1                               |
| myisam_sort_buffer_size         | 10485760                        |
| named_pipe                      | OFF                             |
| net_buffer_length               | 16384                           |
| net_read_timeout                | 30                              |
| net_retry_count                 | 10                              |
| net_write_timeout               | 60                              |
| new                             | OFF                             |
| old_passwords                   | OFF                             |
| open_files_limit                | 622                             |
| pid_file                        | D:\mysql\4.1\Data\testserver.pid|
| port                            | 3307                            |
| preload_buffer_size             | 32768                           |
| protocol_version                | 10                              |
| query_alloc_block_size          | 8192                            |
| query_cache_limit               | 1048576                         |
| query_cache_min_res_unit        | 4096                            |
| query_cache_size                | 8388608                         |
| query_cache_type                | ON                              |
| query_cache_wlock_invalidate    | OFF                             |
| query_prealloc_size             | 8192                            |
| range_alloc_block_size          | 2048                            |
| read_buffer_size                | 61440                           |
| read_only                       | OFF                             |
| read_rnd_buffer_size            | 258048                          |
| relay_log_purge                 | ON                              |
| rpl_recovery_rank               | 0                               |
| secure_auth                     | OFF                             |
| shared_memory                   | OFF                             |
| shared_memory_base_name         | MYSQL                           |
| server_id                       | 0                               |
| skip_external_locking           | ON                              |
| skip_networking                 | OFF                             |
| skip_show_database              | OFF                             |
| slave_net_timeout               | 3600                            |
| slow_launch_time                | 2                               |
| sort_buffer_size                | 262136                          |
| sql_mode                        |                                 |
| storage_engine                  | MyISAM                          |
| sync_binlog                     | 0                               |
| sync_replication                | 0                               |
| sync_replication_slave_id       | 0                               |
| sync_replication_timeout        | 0                               |
| sync_frm                        | ON                              |
| system_time_zone                | Paris, Madrid                   |
| table_cache                     | 256                             |
| table_type                      | MyISAM                          |
| thread_cache_size               | 8                               |
| thread_stack                    | 196608                          |
| time_format                     | %H:%i:%s                        |
| time_zone                       | SYSTEM                          |
| tmp_table_size                  | 7340032                         |
| tmpdir                          |                                 |
| transaction_alloc_block_size    | 8192                            |
| transaction_prealloc_size       | 4096                            |
| tx_isolation                    | REPEATABLE-READ                 |
| version                         | 4.1.10-nt                       |
| version_comment                 | MySQL Community Edition (GPL)   |
| version_compile_machine         | i32                             |
| version_compile_os              | NT                              |
| wait_timeout                    | 28800                           |
+---------------------------------+---------------------------------+

SHOW STATUS;

+--------------------------+---------+
| Variable_name            | Value   |
+--------------------------+---------+
| Aborted_clients          | 0       |
| Aborted_connects         | 0       |
| Binlog_cache_disk_use    | 0       |
| Binlog_cache_use         | 0       |
| Bytes_received           | 486     |
| Bytes_sent               | 3759    |
| Com_admin_commands       | 0       |
| Com_alter_db             | 0       |
| Com_alter_table          | 0       |
| Com_analyze              | 0       |
| Com_backup_table         | 0       |
| Com_begin                | 0       |
| Com_change_db            | 2       |
| Com_change_master        | 0       |
| Com_check                | 0       |
| Com_checksum             | 0       |
| Com_commit               | 0       |
| Com_create_db            | 0       |
| Com_create_function      | 0       |
| Com_create_index         | 0       |
| Com_create_table         | 0       |
| Com_dealloc_sql          | 0       |
| Com_delete               | 0       |
| Com_delete_multi         | 0       |
| Com_do                   | 0       |
| Com_drop_db              | 0       |
| Com_drop_function        | 0       |
| Com_drop_index           | 0       |
| Com_drop_table           | 0       |
| Com_drop_user            | 0       |
| Com_execute_sql          | 0       |
| Com_flush                | 0       |
| Com_grant                | 0       |
| Com_ha_close             | 0       |
| Com_ha_open              | 0       |
| Com_ha_read              | 0       |
| Com_help                 | 0       |
| Com_insert               | 0       |
| Com_insert_select        | 0       |
| Com_kill                 | 0       |
| Com_load                 | 0       |
| Com_load_master_data     | 0       |
| Com_load_master_table    | 0       |
| Com_lock_tables          | 0       |
| Com_optimize             | 0       |
| Com_preload_keys         | 0       |
| Com_prepare_sql          | 0       |
| Com_purge                | 0       |
| Com_purge_before_date    | 0       |
| Com_rename_table         | 0       |
| Com_repair               | 0       |
| Com_replace              | 0       |
| Com_replace_select       | 0       |
| Com_reset                | 0       |
| Com_restore_table        | 0       |
| Com_revoke               | 0       |
| Com_revoke_all           | 0       |
| Com_rollback             | 0       |
| Com_savepoint            | 0       |
| Com_select               | 0       |
| Com_set_option           | 2       |
| Com_show_binlog_events   | 0       |
| Com_show_binlogs         | 0       |
| Com_show_charsets        | 0       |
| Com_show_collations      | 0       |
| Com_show_column_types    | 0       |
| Com_show_create_db       | 0       |
| Com_show_create_table    | 1       |
| Com_show_databases       | 1       |
| Com_show_errors          | 0       |
| Com_show_fields          | 2       |
| Com_show_grants          | 0       |
| Com_show_innodb_status   | 0       |
| Com_show_keys            | 0       |
| Com_show_logs            | 0       |
| Com_show_master_status   | 0       |
| Com_show_new_master      | 0       |
| Com_show_open_tables     | 0       |
| Com_show_privileges      | 0       |
| Com_show_processlist     | 0       |
| Com_show_slave_hosts     | 0       |
| Com_show_slave_status    | 0       |
| Com_show_status          | 1       |
| Com_show_storage_engines | 0       |
| Com_show_tables          | 2       |
| Com_show_variables       | 1       |
| Com_show_warnings        | 0       |
| Com_slave_start          | 0       |
| Com_slave_stop           | 0       |
| Com_truncate             | 0       |
| Com_unlock_tables        | 0       |
| Com_update               | 0       |
| Com_update_multi         | 0       |
| Connections              | 3       |
| Created_tmp_disk_tables  | 0       |
| Created_tmp_files        | 0       |
| Created_tmp_tables       | 0       |
| Delayed_errors           | 0       |
| Delayed_insert_threads   | 0       |
| Delayed_writes           | 0       |
| Flush_commands           | 1       |
| Handler_commit           | 0       |
| Handler_delete           | 0       |
| Handler_discover         | 0       |
| Handler_read_first       | 2       |
| Handler_read_key         | 0       |
| Handler_read_next        | 0       |
| Handler_read_prev        | 0       |
| Handler_read_rnd         | 0       |
| Handler_read_rnd_next    | 10      |
| Handler_rollback         | 0       |
| Handler_update           | 0       |
| Handler_write            | 0       |
| Key_blocks_not_flushed   | 0       |
| Key_blocks_unused        | 8981    |
| Key_blocks_used          | 0       |
| Key_read_requests        | 0       |
| Key_reads                | 0       |
| Key_write_requests       | 0       |
| Key_writes               | 0       |
| Max_used_connections     | 2       |
| Not_flushed_delayed_rows | 0       |
| Open_files               | 2       |
| Open_streams             | 0       |
| Open_tables              | 1       |
| Opened_tables            | 12      |
| Qcache_free_blocks       | 1       |
| Qcache_free_memory       | 8379904 |
| Qcache_hits              | 0       |
| Qcache_inserts           | 0       |
| Qcache_lowmem_prunes     | 0       |
| Qcache_not_cached        | 0       |
| Qcache_queries_in_cache  | 0       |
| Qcache_total_blocks      | 1       |
| Questions                | 12      |
| Rpl_status               | NULL    |
| Select_full_join         | 0       |
| Select_full_range_join   | 0       |
| Select_range             | 0       |
| Select_range_check       | 0       |
| Select_scan              | 0       |
| Slave_open_temp_tables   | 0       |
| Slave_running            | OFF     |
| Slow_launch_threads      | 0       |
| Slow_queries             | 0       |
| Sort_merge_passes        | 0       |
| Sort_range               | 0       |
| Sort_rows                | 0       |
| Sort_scan                | 0       |
| Table_locks_immediate    | 11      |
| Table_locks_waited       | 0       |
| Threads_cached           | 0       |
| Threads_connected        | 2       |
| Threads_created          | 2       |
| Threads_running          | 1       |
| Uptime                   | 315     |
+--------------------------+---------+

C:\Documents and Settings\Séverine MOREL>D:\mysql\4.1\bin\myisamchk.exe -d -v D:
\mysql\4.1\data\test\tbltest

MyISAM file:         D:\mysql\4.1\data\test\tbltest
Record format:       Packed
Character set:       utf8_general_ci (33)
File-version:        1
Creation time:       2005-02-16 11:23:24
Status:              changed
Auto increment key:              1  Last value:                    10
Data records:                   10  Deleted blocks:                 0
Datafile parts:                 10  Deleted data:                   0
Datafile pointer (bytes):        4  Keyfile pointer (bytes):        4
Datafile length:               440  Keyfile length:              4096
Max datafile length:    4294967294  Max keyfile length: 4398046510079
Recordlength:                  305

table description:
Key Start Len Index   Type                     Rec/key         Root  Blocksize
1   1     4   unique  unsigned long                  1         1024       1024
2   5     300 multip. char packed stripped           0         2048       2048
Thread
LOAD INDEX INTO CACHE problemHMax16 Feb
  • Re: LOAD INDEX INTO CACHE problemGleb Paharenko17 Feb
    • Re: LOAD INDEX INTO CACHE problemHMax17 Feb
      • Re: LOAD INDEX INTO CACHE problemGleb Paharenko21 Feb
        • Re: LOAD INDEX INTO CACHE problemHMax21 Feb
          • Re: LOAD INDEX INTO CACHE problemSergei Golubchik21 Feb
            • Re: LOAD INDEX INTO CACHE problemHMax21 Feb
              • Re: LOAD INDEX INTO CACHE problemSergei Golubchik21 Feb
                • Re: LOAD INDEX INTO CACHE problemHMax22 Feb
                  • Re: LOAD INDEX INTO CACHE problemHMax22 Feb
          • Re: LOAD INDEX INTO CACHE problemGleb Paharenko21 Feb
Re: LOAD INDEX INTO CACHE problemCheHax28 Feb