MySQL Forums - Quality Assurance

Mysql replication issue (1 reply)

anoop p k — Sun, 19 May 2013 14:14:59 +0000

I am trying to set mysql replication in my two separate server. I am referring the site https://www.digitalocean.com/community/articles/how-to-set-up-master-slave-replication-in-mysql to do this. But after grant permission to set i got 0 query effected instead of

mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 | 107 | newdatabase | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

Can anybody help me to clearthis?

How to use utf16 with .net (no replies)

freefly pan — Mon, 06 May 2013 08:02:28 +0000

I creat a table by:
CREATE TABLE test(Name VARCHAR(512) CHARSET utf16) ENGINE=INNODB CHARSET=utf16;

I test in default sample: Connector NET 6.6.5\Samples\Table Editor\cs

this is samples code:

data = new DataTable();
da = new MySqlDataAdapter("SELECT * FROM " + tables.SelectedItem.ToString(), conn);
cb = new MySqlCommandBuilder(da);
da.Fill(data); //error:long time no response

Mysql version:5.6.11

How can I do to use utf16

selecting foreign key into a column (2 replies)

ahmad rahimie — Wed, 22 May 2013 06:06:36 +0000

Hello,

Can someone teach me, how to SELECT a foreign key into a column.

For example, I have this table :

USER_TABLE
userID
name
password

BOOK_TABLE (many book to one user)
bookID
userID
bookName

and the thing that I want to select per record is, userID and list of bookID as a column (seperated by ',' delimiter).

[ASK] Database Link (1 reply)

Nurlasmaya Lakuanto — Sat, 04 May 2013 03:48:38 +0000

Hi all,

Is mySQL has "database link" as like as Oracle?
Thank you

Regarding Error code : 1406 : Data Truncation : Data too long for column (2 replies)

Sachin Havinal — Tue, 30 Apr 2013 06:25:43 +0000

Hi All,

I am trying to insert values into table and getting error as ERROR 1406: Data Truncation: Data too long for column 'username'. The size of the column is 20 and I am trying to insert username = (length greater than 20). When I execute the command first time then I get this error. And I tried it one more time then I didn;t get any error and values get inserted into the table successfully with no error. But while inserting it takes only first 20 chars of the username field and skipped remaining. So the question is how doesn't it return any error on second time and also why did it take truncate the username and took only fisrt 20 chars?

What Collation should I use in my database for storing all type of characters that exist in world (no replies)

Nitesh Luharuka — Fri, 26 Apr 2013 13:35:27 +0000

have a website that deals with characters written in Spanish, French, German, English and Catalan language. I run the website using Drupal and MySQL 5.5.

I want to use a collation on my table columns that can store all kind of foreign characters well in the database. For ex - ö, á, ú, ñ, ó,ç etc. I am currently using the collation as utf8_general_ci. But some characters like "ö" are not getting stored in their correct formats. I am confused if I shall change my collation to something different. I am using MySQL 5.5.

I expect the experts here to help me deciding the best collation so that I always am able to store the characters in correct way in MySQL database.

Thanks,
Nitesh

Disable Windows Event Logs (no replies)

MySQL User — Thu, 25 Apr 2013 21:50:36 +0000

The manual (http://dev.mysql.com/doc/refman/5.7/en/error-log.html) says about MySQL and Windows Event Logs:

> In addition, on Windows, events and error messages are written to the Windows Event Log within the Application log. Entries marked as Warning and Note are written to the Event Log, but not informational messages such as information statements from individual storage engines. These log entries have a source of MySQL. You cannot disable writing information to the Windows Event Log.

This is no good. Forcing logs to be mirrored to the Windows Event Log not only wastes resources to make duplicate log entries, but it precludes the ability to create portable servers. Logging to the Event Log should be optional and configurable.

[Reg:- MySql Crash] (2 replies)

Vaibhav Shree — Fri, 26 Apr 2013 09:00:36 +0000

Hello,

I am facing with a problem of MySQL crash from past couple of months and there is no log generated regarding this issue, I have read several post related to this where they are asking to check disk space and memory space, but in my concern all are working fine and there is no issue with the memory space and disk space. After restarting MySQL it works but not getting the exact problem of the above issue.
So please try to help me out to get out of this problem and tell me a solution so that it can be removed permanently.
Thank's in advance

Vaibhav

Client connection port (2 replies)

Wojciech Wiśniewski — Mon, 08 Apr 2013 11:34:11 +0000

I have a problem with connection to MySql database from client machines. The server is configured to use default TCP port 3306. The problem is that clients connect to server using different ports (local?). Clients are located in subnetwork protected by router with access list. Some ports are blocked and it seems that clients try to use one of blocked port after some time. How is it possible? I see in workbench tool connections in the format xxx.xxx.xxx.xxx:port where port is different than 3306. Does anyone know why? Is any port forwarding involved at client machine? Server uses port 3306 but client machines some random ports and sooner or later it uses port blocked by access list.

REPLACE INTO fails when data to be truncated is in the first row (2 replies)

cresley battlelite — Tue, 26 Mar 2013 00:58:41 +0000

REPLACE INTO will truncate data if it is too big for the datatype, and this is correct behaviour, it will then insert the rows into the table.

If, however, the first row requires the data truncation all rows will fail to insert.

Tested on 5.6 GA, Linux
Tested on 5.5.27, Windows

(Should I raise a bug report?)

CREATE TABLE myTable (
`ID` int(11) NOT NULL ,
`parentID` int(11) unsigned NOT NULL,
PRIMARY KEY (`ID`)
) ENGINE=MyISAM ;

-- CORRECT BEHAVIOUR

replace into myTable (ID, parentID)
values
( 1, 2),
( 3, -1875802725),
( 4, 5);

-- returns 3 rows, with -1875802725 truncated to 0.
select * from myTable ;

-- clear the table for the second part of the test (use this or re-create the table if you deem this necessary)
delete from myTable;

-- INCORRECT BEHAVIOUR, BELOW

-- change order of inserts such that truncated data is in first row
replace into myTable (ID, parentID)
values
( 3, -1875802725),
( 1, 2),
( 4, 5);

-- incorrectly returns 0 rows
select * from myTable ;

MySQL is Flawed (no replies)

Marcus Reed — Fri, 22 Mar 2013 15:40:01 +0000

MySQL is flawed.

for example, you cannot create a query that will allow you to have a parameter AND a wildcard:
SELECT * FROM Names WHERE name LIKE % & @PARAM1 & %
There is no way to accomplish a query such as this in MySQL. So in order for me to have a search function for my users in my application, I have to create hundreds of queries of what I believe the user might search for.

This is utterly useless.

Did you see "Got error -1 from storage engine"? (3 replies)

Karel Dytrych — Thu, 11 Apr 2013 11:07:50 +0000

I moved my aplication from old server with MySQL 5.1 to new much more powerfull server where i run new MySQL 5.6.

Now I'm getting couple of time per day strange error:

"Got error -1 from storage engine"

It happen only couple of times per day with simple queries like:

UPDATE innoDbTable SET int_column = 1 WHERE primarykey = 96

or

INSERT INTO differentInnoTable (10cols) VALUES (10values)...

When i see this error in my log i use exactly the same query from mysql console and it always work...

Is there some diagnostic tool which i could try?

Do you have any hints?

Variables from my server:

auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 350
basedir /opt/mysql/server-5.6
big_tables OFF
bind_address *
binlog_cache_size 32768
binlog_checksum CRC32
binlog_direct_non_transactional_updates OFF
binlog_format STATEMENT
binlog_max_flush_queue_time 0
binlog_order_commits ON
binlog_row_image FULL
binlog_rows_query_log_events OFF
binlog_stmt_cache_size 32768
bulk_insert_buffer_size 8388608
character_set_client utf8
character_set_connection utf8
character_set_database latin1
character_set_filesystem binary
character_set_results utf8
character_set_server latin1
character_set_system utf8
character_sets_dir /opt/mysql/server-5.6/share/charsets/
collation_connection utf8_general_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
completion_type NO_CHAIN
concurrent_insert AUTO
connect_timeout 10
core_file OFF
datadir /var/lib/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_storage_engine InnoDB
default_tmp_storage_engine InnoDB
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
disconnect_on_expired_password ON
div_precision_increment 4
end_markers_in_json OFF
enforce_gtid_consistency OFF
eq_range_index_dive_limit 10
error_count 0
event_scheduler OFF
expire_logs_days 10
explicit_defaults_for_timestamp OFF
external_user
flush OFF
flush_time 0
foreign_key_checks ON
ft_boolean_syntax + -><()~*:""&|
ft_max_word_len 84
ft_min_word_len 4
ft_query_expansion_limit 20
ft_stopword_file (built-in)
general_log ON
general_log_file /var/log/mysql/mysql.log
group_concat_max_len 1024
gtid_executed
gtid_mode OFF
gtid_next AUTOMATIC
gtid_owned
gtid_purged
have_compress YES
have_crypt YES
have_dynamic_loading YES
have_geometry YES
have_openssl DISABLED
have_profiling YES
have_query_cache YES
have_rtree_keys YES
have_ssl DISABLED
have_symlink YES
host_cache_size 678
hostname tik02
identity 0
ignore_builtin_innodb OFF
ignore_db_dirs
init_connect
init_file
init_slave
innodb_adaptive_flushing ON
innodb_adaptive_flushing_lwm 10
innodb_adaptive_hash_index ON
innodb_adaptive_max_sleep_delay 150000
innodb_additional_mem_pool_size 8388608
innodb_api_bk_commit_interval 5
innodb_api_disable_rowlock OFF
innodb_api_enable_binlog OFF
innodb_api_enable_mdl OFF
innodb_api_trx_level 0
innodb_autoextend_increment 64
innodb_autoinc_lock_mode 1
innodb_buffer_pool_dump_at_shutdown OFF
innodb_buffer_pool_dump_now OFF
innodb_buffer_pool_filename ib_buffer_pool
innodb_buffer_pool_instances 8
innodb_buffer_pool_load_abort OFF
innodb_buffer_pool_load_at_startup OFF
innodb_buffer_pool_load_now OFF
innodb_buffer_pool_size 33554432
innodb_change_buffer_max_size 25
innodb_change_buffering all
innodb_checksum_algorithm innodb
innodb_checksums ON
innodb_cmp_per_index_enabled OFF
innodb_commit_concurrency 0
innodb_compression_failure_threshold_pct 5
innodb_compression_level 6
innodb_compression_pad_pct_max 50
innodb_concurrency_tickets 5000
innodb_data_file_path ibdata1:12M:autoextend
innodb_data_home_dir
innodb_disable_sort_file_cache OFF
innodb_doublewrite ON
innodb_fast_shutdown 1
innodb_file_format Antelope
innodb_file_format_check ON
innodb_file_format_max Antelope
innodb_file_per_table ON
innodb_flush_log_at_timeout 1
innodb_flush_log_at_trx_commit 1
innodb_flush_method
innodb_flush_neighbors 1
innodb_flushing_avg_loops 30
innodb_force_load_corrupted OFF
innodb_force_recovery 0
innodb_ft_aux_table
innodb_ft_cache_size 8000000
innodb_ft_enable_diag_print OFF
innodb_ft_enable_stopword ON
innodb_ft_max_token_size 84
innodb_ft_min_token_size 3
innodb_ft_num_word_optimize 2000
innodb_ft_server_stopword_table
innodb_ft_sort_pll_degree 2
innodb_ft_user_stopword_table
innodb_io_capacity 200
innodb_io_capacity_max 2000
innodb_large_prefix OFF
innodb_lock_wait_timeout 50
innodb_locks_unsafe_for_binlog OFF
innodb_log_buffer_size 8388608
innodb_log_file_size 50331648
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_lru_scan_depth 1024
innodb_max_dirty_pages_pct 75
innodb_max_dirty_pages_pct_lwm 0
innodb_max_purge_lag 0
innodb_max_purge_lag_delay 0
innodb_mirrored_log_groups 1
innodb_monitor_disable
innodb_monitor_enable
innodb_monitor_reset
innodb_monitor_reset_all
innodb_old_blocks_pct 37
innodb_old_blocks_time 1000
innodb_online_alter_log_max_size 134217728
innodb_open_files 2000
innodb_optimize_fulltext_only OFF
innodb_page_size 16384
innodb_print_all_deadlocks OFF
innodb_purge_batch_size 300
innodb_purge_threads 1
innodb_random_read_ahead OFF
innodb_read_ahead_threshold 56
innodb_read_io_threads 4
innodb_read_only OFF
innodb_replication_delay 0
innodb_rollback_on_timeout OFF
innodb_rollback_segments 128
innodb_sort_buffer_size 1048576
innodb_spin_wait_delay 6
innodb_stats_auto_recalc ON
innodb_stats_method nulls_equal
innodb_stats_on_metadata OFF
innodb_stats_persistent ON
innodb_stats_persistent_sample_pages 20
innodb_stats_sample_pages 8
innodb_stats_transient_sample_pages 8
innodb_strict_mode OFF
innodb_support_xa ON
innodb_sync_array_size 1
innodb_sync_spin_loops 30
innodb_table_locks ON
innodb_thread_concurrency 0
innodb_thread_sleep_delay 10000
innodb_undo_directory .
innodb_undo_logs 128
innodb_undo_tablespaces 0
innodb_use_native_aio ON
innodb_use_sys_malloc ON
innodb_version 1.2.10
innodb_write_io_threads 4
insert_id 0
interactive_timeout 28800
join_buffer_size 262144
keep_files_on_create OFF
key_buffer_size 16777216
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
large_files_support ON
large_page_size 0
large_pages OFF
last_insert_id 0
lc_messages en_US
lc_messages_dir /opt/mysql/server-5.6/share/
lc_time_names en_US
license GPL
local_infile ON
lock_wait_timeout 31536000
locked_in_memory OFF
log_bin OFF
log_bin_basename
log_bin_index
log_bin_trust_function_creators OFF
log_bin_use_v1_row_events OFF
log_error /var/lib/mysql/tik02.err
log_output FILE
log_queries_not_using_indexes ON
log_slave_updates OFF
log_throttle_queries_not_using_indexes 0
log_warnings 1
long_query_time 2.000000
low_priority_updates OFF
lower_case_file_system OFF
lower_case_table_names 0
master_info_repository FILE
master_verify_checksum OFF
max_allowed_packet 33554432
max_binlog_cache_size 18446744073709547520
max_binlog_size 104857600
max_binlog_stmt_cache_size 18446744073709547520
max_connect_errors 100
max_connections 1500
max_delayed_threads 20
max_error_count 64
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_prepared_stmt_count 16382
max_relay_log_size 0
max_seeks_for_key 18446744073709551615
max_sort_length 1024
max_sp_recursion_depth 0
max_tmp_tables 32
max_user_connections 0
max_write_lock_count 18446744073709551615
metadata_locks_cache_size 1024
metadata_locks_hash_instances 8
min_examined_row_limit 0
multi_range_count 256
myisam_data_pointer_size 6
myisam_max_sort_file_size 9223372036853727232
myisam_mmap_size 18446744073709551615
myisam_recover_options BACKUP
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
old OFF
old_alter_table OFF
old_passwords 0
open_files_limit 7500
optimizer_prune_level 1
optimizer_search_depth 62
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,subquery_materialization_cost_based=on,use_index_extensions=on
optimizer_trace enabled=off,one_line=off
optimizer_trace_features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on
optimizer_trace_limit 1
optimizer_trace_max_mem_size 16384
optimizer_trace_offset -1
performance_schema ON
performance_schema_accounts_size 100
performance_schema_digests_size 10000
performance_schema_events_stages_history_long_size 10000
performance_schema_events_stages_history_size 10
performance_schema_events_statements_history_long_size 10000
performance_schema_events_statements_history_size 10
performance_schema_events_waits_history_long_size 10000
performance_schema_events_waits_history_size 10
performance_schema_hosts_size 100
performance_schema_max_cond_classes 80
performance_schema_max_cond_instances 6900
performance_schema_max_file_classes 50
performance_schema_max_file_handles 32768
performance_schema_max_file_instances 2154
performance_schema_max_mutex_classes 200
performance_schema_max_mutex_instances 14000
performance_schema_max_rwlock_classes 30
performance_schema_max_rwlock_instances 5800
performance_schema_max_socket_classes 10
performance_schema_max_socket_instances 3020
performance_schema_max_stage_classes 150
performance_schema_max_statement_classes 167
performance_schema_max_table_handles 4000
performance_schema_max_table_instances 12500
performance_schema_max_thread_classes 50
performance_schema_max_thread_instances 3100
performance_schema_session_connect_attrs_size 512
performance_schema_setup_actors_size 100
performance_schema_setup_objects_size 100
performance_schema_users_size 100
pid_file /var/run/mysqld/mysqld.pid
plugin_dir /opt/mysql/server-5.6/lib/plugin/
port 3306
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
protocol_version 10
proxy_user
pseudo_slave_mode OFF
pseudo_thread_id 43865
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 16777216
query_cache_type OFF
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
rand_seed1 0
rand_seed2 0
range_alloc_block_size 4096
read_buffer_size 131072
read_only OFF
read_rnd_buffer_size 262144
relay_log
relay_log_basename
relay_log_index
relay_log_info_file relay-log.info
relay_log_info_repository FILE
relay_log_purge ON
relay_log_recovery OFF
relay_log_space_limit 0
report_host
report_password
report_port 3306
report_user
secure_auth ON
secure_file_priv
server_id 0
server_id_bits 32
server_uuid 01fac1d2-8b69-11e2-8a99-00163e10de95
skip_external_locking ON
skip_name_resolve ON
skip_networking OFF
skip_show_database OFF
slave_allow_batching OFF
slave_checkpoint_group 512
slave_checkpoint_period 300
slave_compressed_protocol OFF
slave_exec_mode STRICT
slave_load_tmpdir /tmp
slave_max_allowed_packet 1073741824
slave_net_timeout 3600
slave_parallel_workers 0
slave_pending_jobs_size_max 16777216
slave_rows_search_algorithms TABLE_SCAN,INDEX_SCAN
slave_skip_errors OFF
slave_sql_verify_checksum ON
slave_transaction_retries 10
slave_type_conversions
slow_launch_time 2
slow_query_log ON
slow_query_log_file /var/log/mysql/mysql-slow.log
socket /var/run/mysqld/mysqld.sock
sort_buffer_size 262144
sql_auto_is_null OFF
sql_big_selects ON
sql_buffer_result OFF
sql_log_bin ON
sql_log_off OFF
sql_mode STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION
sql_notes ON
sql_quote_show_create ON
sql_safe_updates OFF
sql_select_limit 18446744073709551615
sql_slave_skip_counter 0
sql_warnings OFF
ssl_ca
ssl_capath
ssl_cert
ssl_cipher
ssl_crl
ssl_crlpath
ssl_key
storage_engine InnoDB
stored_program_cache 256
sync_binlog 0
sync_frm ON
sync_master_info 10000
sync_relay_log 10000
sync_relay_log_info 10000
system_time_zone CET
table_definition_cache 1400
table_open_cache 2000
table_open_cache_instances 1
thread_cache_size 8
thread_concurrency 10
thread_handling one-thread-per-connection
thread_stack 262144
time_format %H:%i:%s
time_zone SYSTEM
timed_mutexes OFF
timestamp 1363551365.087333
tmp_table_size 16777216
tmpdir /tmp
transaction_alloc_block_size 8192
transaction_allow_batching OFF
transaction_prealloc_size 4096
tx_isolation REPEATABLE-READ
tx_read_only OFF
unique_checks ON
updatable_views_with_limit YES
version 5.6.10-log
version_comment MySQL Community Server (GPL)
version_compile_machine x86_64
version_compile_os debian6.0
wait_timeout 28800
warning_count 0

After 8 hour mysql error: MYSQL server has gone away (no replies)

Steven Wu — Fri, 15 Mar 2013 13:09:09 +0000

I use twisted dbpool to connect to mysql. However, every morning my program throw "Mysql server has gone away" exception.
the reference say that mysql 5.5 disable reconnect and will kill the idle connection.
can any body tell me how to configure the mysql to enable the reconnect?

create memory engine table slow (no replies)

Steven Wu — Fri, 15 Mar 2013 13:02:31 +0000

It's strange that it took 0.53 second when I created a memory engine table.The sql I used is bollow:

> use test;
> create table test_para(para0 integer, para1 integer, para2 integer, para3 integer, para4 integer, para5 integer) engine = memory;

sometimes, it took 0.08 second, but most of the time it took 0.53 second.

can any body tell me the reason and how to solve?

some SQL are not caught in the query-slow.log (no replies)

tiger zhang — Fri, 01 Mar 2013 03:34:34 +0000

when I turn on the slow_query_log_file ,and found lots of SQL is not caught in the file , as followed:
I want to know : how can I find the missed SQL( there is only commit).

the server version: mysql Ver 14.14 Distrib 5.1.32, for unknown-linux-gnu (x86_64) using readline 5.1
main parameters: binlog_format=mixed

thanks!

# Time: 130301 6:51:58
# User@Host: dingzhic[dingzhic] @ [192.168.1.106]
# Query_time: 1.768163 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1362091918;
commit;
# User@Host: dingzhic[dingzhic] @ [127.0.0.1]
# Query_time: 1.545211 Lock_time: 0.000039 Rows_sent: 0 Rows_examined: 0
SET timestamp=1362091918;
CALL loginUpdate2(582272,null,'192.168.1.125',0,'','',1);
# Time: 130301 6:54:37
# User@Host: dingzhic[dingzhic] @ [192.168.1.106]
# Query_time: 1.137814 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1362092077;
commit;

How to Restoring The Database in My Sql. (5 replies)

Jaya kumar — Wed, 24 Apr 2013 17:34:58 +0000

Hi

How to Restore the My Sql Database Through Query Not a Command Line.

I want to Execute My Sql Work Bench.

I want to make two database in under one database (no replies)

Kaleem Mohd — Fri, 08 Feb 2013 11:37:50 +0000

Hello all of you,
I am new to mysql as well as to this forum. I am facing a problem in mysql, i want to make two databases under one database so that my CRM can fetch old and new customers and new customers separately from two databases. I want to make to databases like this in phpmyadmin on localhost -

Main database (note it does not contain tables, nor it is clickable)
Sub database 1 (it contains tables)
Sub database 2 (it contains tables)

Plz help me doing this.

Thanks...!!!!

Add char ' as a letter to utf8 collation for FULL-Text search (no replies)

Alexey Russkin — Wed, 06 Feb 2013 14:47:48 +0000

I need add char ' (apostrophe) as a letter to utf8 collation to full-text search strings like "ab'cd".

I read docs (http://dev.mysql.com/doc/refman/5.0/en/fulltext-fine-tuning.html and others) but still don't know how I can do this.

For non-Unicode charsets we can do like this http://dev.mysql.com/doc/refman/5.0/en/full-text-adding-collation.html. But there is no something like utf8.xml on my /usr/share/mysql/charsets.

I can't recompile mysql on server.

How can I do this?.. Thanks.

mysqld got signal 11 (no replies)

Tim Harvey — Mon, 04 Feb 2013 17:08:49 +0000

The MySQL server crashed earlier and has logged a backtrace I'm just wondering if anyone is able to provide any insight into what may have been the cause of the crash please? It looke to me like it's something to do with query caching?

13:16:38 UTC - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=67
max_threads=2000
thread_count=45
connection_count=45
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 4382988 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x62685b0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 7fa9580cbd98 thread_stack 0x40000
/usr/libexec/mysqld(my_print_stacktrace+0x2e)[0x78569e]
/usr/libexec/mysqld(handle_fatal_signal+0x493)[0x66faf3]
/lib64/libpthread.so.0[0x304200f500]
/usr/libexec/mysqld(my_hash_delete+0x292)[0x76f352]
/usr/libexec/mysqld(_ZN11Query_cache10free_queryEP17Query_cache_block+0x20)[0x554260]
/usr/libexec/mysqld(_ZN11Query_cache14free_old_queryEv+0x64)[0x5542e4]
/usr/libexec/mysqld(_ZN11Query_cache14allocate_blockEmcm+0x98)[0x554398]
/usr/libexec/mysqld(_ZN11Query_cache19allocate_data_chainEPP17Query_cache_blockmS1_c+0x95)[0x554445]
/usr/libexec/mysqld(_ZN11Query_cache17write_result_dataEPP17Query_cache_blockmPhS1_NS0_10block_typeE+0x27)[0x5546f7]
/usr/libexec/mysqld(_ZN11Query_cache18append_result_dataEPP17Query_cache_blockmPhS1_+0x166)[0x5548f6]
/usr/libexec/mysqld(_ZN11Query_cache6insertEP15Query_cache_tlsPKcmj+0x133)[0x556e83]
/usr/libexec/mysqld(net_real_write+0x3e)[0x51baae]
/usr/libexec/mysqld(net_flush+0x1b)[0x51bdab]
/usr/libexec/mysqld(_Z12net_send_eofP3THDjj+0x68)[0x520658]
/usr/libexec/mysqld(_ZN8Protocol13end_statementEv+0x95)[0x51f8a5]
/usr/libexec/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1ae)[0x584b6e]
/usr/libexec/mysqld(_Z24do_handle_one_connectionP3THD+0xd2)[0x614ea2]
/usr/libexec/mysqld(handle_one_connection+0x50)[0x614fb0]
/lib64/libpthread.so.0[0x3042007851]
/lib64/libc.so.6(clone+0x6d)[0x30418e811d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7fa7d0004c30): is an invalid pointer
Connection ID (thread ID): 275357
Status: NOT_KILLED

Chinese Characters in mysql ? (1 reply)

Loga Guhan — Fri, 15 Feb 2013 13:43:41 +0000

Hello All,

am new to mysql.Am trying to insert Chinese Characters to my table in mysql DB.
The query is as follows,
insert into tbltest values(1893,'太原星河湾酒店 ','asgvsd');

but once inserted th chinese characters are displayed as '??????'.

I executed the following,

ALTER DATABASE testtb CHARACTER SET utf8 COLLATE utf8_general_ci;

ALTER TABLE tbltest CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

SQL ERROR (no replies)

First Last — Tue, 29 Jan 2013 08:18:42 +0000

I am running a forum at http://www.sbellast.com/forum/

SQL ERROR [ mysql4 ]

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) [2002]

An sql error occurred while fetching this page. Please contact an administrator if this problem persists.

What should I do? Does this error show up often?

MySQL data files loss after server reboot (no replies)

Anuchapong Maknuan — Thu, 24 Jan 2013 13:54:22 +0000

Hi Expert,

I have the question about the data files on MySQL loss after server had accident reboot.

After server up, I tried to bring up the mysql instance but it couldn't because the all data files loss. During startup,

I found the message
--- clip ---
Jan 5 03:30:38 PL_2_8 mysqld: mysqld: Table 'mysql.plugin' doesn't exist
Jan 5 03:30:38 PL_2_8 mysqld: 130105 3:30:38 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.  Is it safe to run this
Jan 5 03:30:38 PL_2_8 mysqld: 130105 3:30:38 [Note] NDB: NodeID is 10, management server '10.1.1.10:2372'
Jan 5 03:30:39 PL_2_8 mysqld: 130105 3:30:39 [Note] NDB[0]: NodeID: 10, all storage nodes connected
Jan 5 03:30:39 PL_2_8 mysqld: 130105 3:30:39 [Note] Starting Cluster Binlog Thread
Jan 5 03:30:39 PL_2_8 mysqld: 130105 3:30:39 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

--- clap ---

After I saw this message, I went to look inside the data files and found it missing.

root# du -sh mysqldMaster/*
4.0M mysqldMaster/binlogs
4.0K mysqldMaster/data
4.0K mysqldMaster/tmp

root# pwd
/local/cudb/mysql/mysqldMaster/data
root# ls -al
total 8
drwxr-xr-x 2 mysql root 4096 Jan 5 03:35 .
drwxr-xr-x 5 mysql root 4096 Jan 5 03:35 ..
--- clap ---

Any one has experience similar this and any cause of this data file loss?

MAC Address from Server(MySQL Instance) (no replies)

Nivaldo Ribeiro — Fri, 18 Jan 2013 19:47:56 +0000

Hi,

Someone knows how to get the mac address from the machine that MySQL is running?

Thanks.

Question of multiple registers (no replies)

Jason Reynolds — Fri, 28 Dec 2012 21:00:55 +0000

I was just wondering, From a html/php registration page, it sends the information to a mysql database, So basically my question is.

Are you able to register one time, So that it will post the data to the first database, then the first database will post it to the numerous databases that you want after that?

Relay_log fast execution (no replies)

Adeela Syeda — Thu, 20 Dec 2012 07:36:30 +0000

hello
i am adeela sahar working as DBA on mysql. i found a problem that in replication, slave have to wait for long time till the relay_log executes all queries on it. why mysql dont have any speedup execution parameter for relay_log, so that on demand slave can execute transactions and queries or any multi-threaded mechanism.

Adeela

Rename server (no replies)

John Ince — Sun, 16 Dec 2012 21:03:22 +0000

New computer. The server name ended up "host" and all my connections are for "localhost".
How can I change the host name?
Windows7

mySql query execution plan (no replies)

Carlos Bras — Fri, 07 Dec 2012 09:52:09 +0000

Hello,

We are trying to build a small standard data mart model using ti kimball approach on a mySql database .. however the performace of the model is pretty slow.

After some investigation we found out that the performace issue its because mySql is not providing us the best execution plans.

Or model is as per following:

Create table fact
(date_id int
, dim1_id int
, dim2_id int
, dim3_id int
, measure1 int
, measure2 int)
partition by date_id
;
-- =~10000 per day/partition

Create table dim1
( dim1_id int
, dim1_name varchar(50 char)
, dim1_desc varchar(250 char)
)
;
-- 300 records

Create table dim2
( dim2_id int
, dim2_name varchar(50 char)
, dim2_desc varchar(250 char)
)
;
-- 50 records

Create table dim3
( dim3_id int
, dim3_name varchar(50 char)
, dim3_desc varchar(250 char)
)
;
-- 25 records

when we run the following query:

select t2.dim1_name, t3.dim2_name, t4.dim3_name, sum(t1.measure1)
from fact t1
inner join dim1 t2 on t1.dim1_id = t2.dim1_id
inner join dim2 t3 on t1.dim2_id = t3.dim2_id
inner join dim3 t4 on t1.dim3_id = t4.dim3_id
where t1.date_id = 20120401
and t1.dim1_id = 99
group by t2.dim1_name, t3.dim2_name, t4.dim3_name
;

the execution plan that we have is:

'1', 'SIMPLE', 't4', 'ALL', NULL, NULL, NULL, NULL, '25', 'Using temporary; Using filesort'
'1', 'SIMPLE', 't3', 'ALL', NULL, NULL, NULL, NULL, '50', 'Using join buffer'
'1', 'SIMPLE', 't2', 'ALL', NULL, NULL, NULL, NULL, '300', 'Using where; Using join buffer'
'1', 'SIMPLE', 't1', 'ALL', NULL, NULL, NULL, NULL, '10532', 'Using where; Using join buffer'

which it is far from being the best one .... since it's joining dim1 with dim2 with dim3 where there is no joining link ..

is there any way for us to manipulate the mySql resolver in order to get better execution plans ..
we were expecting it to return something like:

'1', 'SIMPLE', 't2', 'ALL', NULL, NULL, NULL, NULL, '300', 'Using where; Using join buffer'
'1', 'SIMPLE', 't1', 'ALL', NULL, NULL, NULL, NULL, '10532', 'Using where; Using join buffer'
'1', 'SIMPLE', 't4', 'ALL', NULL, NULL, NULL, NULL, '25', 'Using temporary; Using filesort'
'1', 'SIMPLE', 't3', 'ALL', NULL, NULL, NULL, NULL, '50', 'Using join buffer'

We've tried to play arround with the variable
- optimizer_prune_level
- optimizer_search_depth
- optimizer_switch

with no success.

thanks in advance for you help.

Regards,
Carlos

How to import views - fedora phpmyadmin (no replies)

waseem baraskar — Fri, 30 Nov 2012 11:25:18 +0000

Hi everyone outthere,

I am shifting database from one machine to another machine.
My os is fedora 7. The both machine have same os & alomot same configuration.

when I am importing table in phpmyadmin, they are imported successfully.
But when I am importing views they giving me error.How can I fix this.Please help me out.

The error==>
SQL query:

--
-- Database: `Trovit`
--
-- --------------------------------------------------------
--
-- Stand-in structure for view `QC_Daily_Count`
--
CREATE TABLE IF NOT EXISTS `QC_Daily_Count` (
`qcd_engineer` NULL ,
`QC_daily_Count` bigint( 21 )
);

MySQL said: Documentation
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'null
,`QC_daily_Count` bigint(21)
)' at line 2

--------------------------------------------------------------------------------
I also use command mysqldump but same error occured.
mysql Trovit -u root -p < QC_Daily_Count.sql

Please help me out.
any suggesstion are helpful.
thanks in advance.

mysql query (1 reply)

uday vanaparthi — Wed, 28 Nov 2012 10:32:33 +0000

>create table emp(empid int,name varchar2(10));
insert into emp values (1,'uday'),(2,'kumar');

Q) why the o/p is (colomun name as 3 and data as 3)
>select 3 from emp;

please any one help me out .

MySQL Vs My Laptop (no replies)

Graeme Matthew — Mon, 26 Nov 2012 05:09:06 +0000

I used "HP 650 C5Q32PA core i3-3110M 4GB, 500GB, 15.6"HD, Intel HD 3000, DVDRW, WL, BT, WC, Win8 Home 64Bit" Laptop but I don't know what is the problem with my PC SQL can't work properly,some important feature don't worked.I don't know why here is my laptop >> http://penta.com.au/cheap-laptop/hp-650-c5q32pa-core-i3-3110m-4gb-500gb-15-6-hd-intel-hd-3000-dvdrw-wl-bt-wc-win8-home-64bit-1yr-p-95116.No doubet The Laptop is super one but............ help me please.