mysql – “mysqld” vs “server” in my.cnf

I used to see server-related configuration in my.cnf located under [mysqld].

However, I now come across configurations that use [server] instead.

It looks like both of them are synonyms, at least on MySQL 8.0, I can see that options under both groups apply to the MySQL server.

Is this a new feature of MySQL 8.0? Is one of them preferred over the other? Is one of them deprecated?

mysql – Do MyISAM tables crash from a “clean” mysqld restart?

I’ve researched this topic a little bit and available information indicates that MyISAM tables should not crash on their own from a simple server restart. Usually the following causes are put forth:

  • hardware bug
  • server terminated abruptly (e.g. SIGKILL)
  • system-level issues, such as OOM scenarios, out-of-disk space, or system panics

However, on my environment, a “normal” mysqld shutdown and restart operation has been seen to occasionally cause tables to crash. No other anomalous condition or system-level error was present. The tables are almost always the ones that are hit with the most amount of queries. The server is practically executing queries against these tables continuously, and not all of them are DML queries. The tables are frequently altered, optimized, and so on. However, in all cases, the server is shut down by issuing a SIGTERM, and waiting until it exits on its own, with an exit code of 0. It is never abruptly terminated.

The tables are subsequently successfully repaired with a “REPAIR TABLE” query, but this doesn’t tell me why the problem happened to begin with.

Changing the architecture to avoid this problem is infeasible, so I need to know why it happens. Is MyISAM inherently subject to corruption upon server shutdown?

/ usr / sbin / mysqld –daemonize –pid-file = / run / mysqld / mysqld.pid (code = left, status = 1 / FAILURE)

I had to install MySql on Ubuntu 18.04.4 LTS (GNU / Linux 4.15.0-1065-aws x86_64)
But there are errors:

ExecStart = / usr / sbin / mysqld –daemonize
–pid-file = / run / mysqld / mysqld.pid (code = left, status = 1 / FAILURE)

enter description of image here

Help me!

Migrated mySQL to a new host with mySQL 8.0.17, unable to update / start mysqld

I recently installed a new host with mySQL version 8.0.17 and moved an old mySQL database (version 5.1.73) to it. For now, I can't start mysqld and I can't run an update to fix the tables.

I tried to perform a mysql upgrade as mentioned in the log, but that doesn't seem to help. At the start I ran mysql_upgrade but this feature is deprecated, so instead I ran mysqld --upgrade=AUTO and I still have problems with starting the service. What am i doing wrong?

Here is the output of mysqld.log:

2020-02-07T01:09:23.054386Z 0 (Warning) (MY-011070) (Server) 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
2020-02-07T01:09:23.056223Z 0 (System) (MY-010116) (Server) /usr/libexec/mysqld (mysqld 8.0.17) starting as process 1533
2020-02-07T01:09:24.005561Z 0 (Warning) (MY-010727) (Server) System table 'plugin' is expected to be transactional.
2020-02-07T01:09:24.188459Z 0 (Warning) (MY-010068) (Server) CA certificate ca.pem is self signed.
2020-02-07T01:09:24.206417Z 0 (Warning) (MY-010929) (Server) Storage engine 'MyISAM' does not support system tables. (mysql.user).
2020-02-07T01:09:24.206431Z 0 (Warning) (MY-010929) (Server) Storage engine 'MyISAM' does not support system tables. (mysql.db).
2020-02-07T01:09:24.206442Z 0 (Warning) (MY-010929) (Server) Storage engine 'MyISAM' does not support system tables. (mysql.tables_priv).
2020-02-07T01:09:24.206466Z 0 (Warning) (MY-010929) (Server) Storage engine 'MyISAM' does not support system tables. (mysql.columns_priv).
2020-02-07T01:09:24.206486Z 0 (Warning) (MY-010929) (Server) Storage engine 'MyISAM' does not support system tables. (mysql.procs_priv).
2020-02-07T01:09:24.206719Z 0 (Warning) (MY-013143) (Server) Column count of mysql.user is wrong. Expected 51, found 39. The table is probably corrupted
2020-02-07T01:09:24.206740Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.db. The table is probably corrupted!
2020-02-07T01:09:24.206762Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.db. The table is probably corrupted!
2020-02-07T01:09:24.206799Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.tables_priv. The table is probably corrupted!
2020-02-07T01:09:24.206818Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.tables_priv. The table is probably corrupted!
2020-02-07T01:09:24.206834Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.tables_priv. The table is probably corrupted!
2020-02-07T01:09:24.206853Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.columns_priv. The table is probably corrupted!
2020-02-07T01:09:24.206876Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.columns_priv. The table is probably corrupted!
2020-02-07T01:09:24.206892Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.procs_priv. The table is probably corrupted!
2020-02-07T01:09:24.206912Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.procs_priv. The table is probably corrupted!
2020-02-07T01:09:24.206942Z 0 (Warning) (MY-013139) (Server) Cannot load from mysql.procs_priv. The table is probably corrupted!
2020-02-07T01:09:24.207159Z 0 (ERROR) (MY-010316) (Server) Fatal error: Could not read the column 'authentication_string' from table 'mysql.user'. Please perform the MySQL upgrade procedure.
2020-02-07T01:09:24.207286Z 0 (ERROR) (MY-010952) (Server) The privilege system failed to initialize correctly. For complete instructions on how to upgrade MySQL to a new version please see the 'Upgrading MySQL' section from the MySQL manual.
2020-02-07T01:09:24.208023Z 0 (ERROR) (MY-010119) (Server) Aborting
2020-02-07T01:09:25.468177Z 0 (System) (MY-010910) (Server) /usr/libexec/mysqld: Shutdown complete (mysqld 8.0.17) Source distribution.

mysql – Why does mysqld cost so much memory?

The 2 GB memory isn't that much, especially for a server. (My cell phone 2 years and older has 2 times more RAM than your server)

2 processor cores and 2 GB is the bare minimum necessary to be in a supported configuration for MySQL. Database systems are memory intensive because they are designed to handle large amounts of data. RDBMS want to keep data in memory to avoid performing physical I / O operations.

It is safe to assume that this minimum of 2 GB represents the operating system and MySQL, and nothing else to be run on the server.

I notice at the exit of your ps command that you also run MySQL Workbench, Docker, Python and a few other bits. None of them alone consume a lot of resources, but they all have their own memory and CPU requirements, which compete for a very small amount of memory.

In the end, you just need more power, especially if performance is important. You can try to move everything, except MySQL, to another server, and explore distributions as minimalist as possible, but success on this route is not guaranteed. Just adding more memory (and maybe virtual processors … Given the small memory size, I guess a very small number of processors) is a "sure thing"

mysqld multi – Mariadb refuses to start a new instance

I have two Mariadb production servers running Ubuntu 16.04 on which a second instance runs on port 3307. I have configured a third instance to run on port 3309. J & # 39; I created a new data directory and assigned the property of the mysql user. I have initialized the new instances with:

sudo mysql_install_db --user = mysql --basedir = / usr --datadir = / data / cluster --defaults-file = / etc / mysql / conf.d / cluster.cnf

When I try to start instances with mysqld_multi start 400 I receive the same errors on both:

2019-06-07 11:34:03 139746831079616 [Note] InnoDB: 5.7.19 started; log sequence number 1603704
2019-06-07 11:34:03 139745711597312 [Note] InnoDB: Loading Buffer Pool (s) from / data / cluster / mysql / ib_buffer_pool
2019-06-07 11:34:03 139745711597312 [Note] InnoDB: Unable to open in read / data / cluster / mysql / ib_buffer_pool: No such file or directory
2019-06-07 11:34:03 139746831079616 [Note] The plugin & # 39; FEEDBACK & # 39; is disabled.
2019-06-07 11:34:03 139746831079616 [ERROR] Can not open the mysql.plugin table. Some plugins may not be loaded
2019-06-07 11:34:03 139746831079616 [Note] Recovery after a crash with corvex-bin
2019-06-07 11:34:03 139746831079616 [Note] Start of disaster recovery ...
2019-06-07 11:34:03 139746831079616 [Note] Recovery after accident completed.
2019-06-07 11:34:03 139746319828736 [Warning] Unable to load the slave replication state from the mysql.gtid_slave_pos table: 1146: The mysql.gtid_slave_pos table ################################################################################## does not exist
2019-06-07 11:34:03 139746831079616 [ERROR] Unable to open and lock privilege tables: mysql.servers table & # 39; does not exist
2019-06-07 11:34:03 139746831079616 [Note] Socket server created on IP: "0.0.0.0".
2019-06-07 11:34:03 139746831079616 [ERROR] Fatal Error: Unable to open and lock privilege tables: mysql.user table & # 39; does not exist.

All I have seen is this error to the recent mariadb upgrade, but that is not the case. These servers have not been upgraded, I just add another instance to call with mysqld_multi.

Can not stop mysqld with mysqladmin

I am in MySQl8.0 on macOS. I've tried to stop mysqld with the following way:

  • kill this process from the activity monitor, but it will restart immediately by itself.
    enter the description of the image here

  • kill this with mysqlsadmin, but still failed.enter the description of the image here

It's just missed without a message, I was really confused …

mysql – the mysqld folder is missing in / var / run in Ubuntu 18.04

I've installed php and all dependencies but mysql does not work.
so I started by giving the following command

mysql -u root -p

and I get the following answer

Enter the password:
ERROR 2002 (HY000): Can not connect to local MySQL server via socket /var/run/mysqld/mysqld.sock' (2)

Also, when I go to / var / run, there is no folder with the name mysqld

cd / var / run / mysqld
bash: cd: / var / run / mysqld: No such file or directory

Look at that

cd / var / run
aq @ DevilsBook: / var / run $ ls
acpid.pid console installation dhclient-wlo1.pid initctl mount rsyslogd.pid user sudo
acpid.socket crond.pid dmeventd-client network initramfs sendigs.omit.d systemd utmp
alsa crond.reboot dmeventd-server lock NetworkManager shm thermald uuidd
apache2 cryptsetup fsck php log snapd-snap.socket tmpfiles.d wpa_supplicant
cups avahi-daemon gdm3 lvm plymouth snapd.socket udev
blkid dbus gdm3.pid lvmetad.pid pppconfig spice-vdagentd udisks2

Otherwise, there is a folder named mysql and mysql-upgrade in / var / lib.

    cd / var / lib
aq @ DevilsBook: / var / lib $ ls
AccountsService colord Locale gconf os-prober sudo ureadahead
acpi-support command-not-found-gdm3 lockdown PackageKit systemd usb_modeswitch
alsa dbus geoclue logrotate pam ubiquity usbutils
apache2 dhcp ghostscript php-man ubuntu-drivers-common vim
app-info dictionaries-common git misc plymouth ubuntu-release-upgrade whoopsie
apt dkms mlocate hp polkit-1 ucf xfonts
aspell dpkg initramfs-tools private mysql udisks2 xkb
avahi-autoip emacsen-common ispell mysql upgrade python update-manager
bluetooth free network OfficeManager snapd update-notify
boltd fwupdate libxml-sax-pearl nginx snmp upower

How can I locate the folder and package to eliminate this problem?

mysql – CentOS 6.9 mysqld start fails without innodb_force_recovery = 3

Help me, please. I googled and searched here, but I could not solve my problem.

The problem is that mysqld start service failed. But if I write innodb_force_recovery = 3 in my.cnf, mysqld starts. Even in this case, using mysql CLI and after changing the database, show tables; responds "lost connection to the server."

My environments are
CentOS 6.9 (Final)
mysql Ver 14.14 Distrib 5.6.42, for Linux (x86_64) using the EditLine wrapper

Here is my.cnf

# For tips on how to change settings, please refer to
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

[mysqld]
#innodb_force_recovery = 3
#
# Delete the # and set the amount of RAM for the most important data
# cache in MySQL. Start at 70% of the total RAM of the dedicated server, if not 10%.
# innodb_buffer_pool_size = 128M
#
# Delete # preceding to enable a very important data integrity option: logging
# change the binary log between backups.
# log_bin
#
# Remove # principals to set the options that are primarily useful for report servers.
# Server defaults are faster for transactions and quick SELECTs.
# Adjust the sizes if necessary, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir = / var / lib / mysql
socket = / var / lib / mysql / mysql.sock
tmpdir = / tmp /
explicit_defaults_for_timestamp = 1

# It is recommended to disable symbolic links to avoid various security risks.
symbolic-links = 0

# Recommended in the standard MySQL configuration
sql_mode = NO_ENGINE_SUBSTITUTION, STRICT_TRANS_TABLES 

[mysqld_safe]
log-error = / var / log / mysqld.log
pid-file = / var / run / mysqld / mysqld.pid

And here is mysqld.log

// Start mysqld with innodb_force_recovery = 3 in my.cnf.
// and stop mysqld to edit my.cnf.

2018-12-19 22:33:23 31032 [Note] The plugin & # 39; FEDERATED & # 39; is disabled.
2018-12-19 22:33:23 31032 [Note] InnoDB: Using Atomics to reference buffer pool pages
2018-12-19 22:33:23 31032 [Note] InnoDB: the InnoDB memory segment is deactivated
2018-12-19 22:33:23 31032 [Note] InnoDB: mutex and rw_locks use GCC atomic coding
2018-12-19 22:33:23 31032 [Note] InnoDB: the memory barrier is not used
2018-12-19 22:33:23 31032 [Note] InnoDB: Compressed tables use zlib 1.2.11
2018-12-19 22:33:23 31032 [Note] InnoDB: Using the native Linux AIO
2018-12-19 22:33:23 31032 [Note] InnoDB: Using CPU crc32 instructions
2018-12-19 22:33:23 31032 [Note] InnoDB: Initializing the buffer pool, size = 128.0M
2018-12-19 22:33:23 31032 [Note] InnoDB: end of buffer pool initialization
2018-12-19 22:33:23 31032 [Note] InnoDB: The most supported file format is Barracuda.
2018-12-19 22:33:23 31032 [Note] InnoDB: 128 cancellation segments are active.
2018-12-19 22:33:23 31032 [Note] InnoDB: 5.6.42 started; log sequence number 4940380617
2018-12-19 22:33:23 31032 [Note] InnoDB: !!! innodb_force_recovery is set to 3 !!!
2018-12-19 22:33:23 31032 [Note] Host name of the server (link address): "###; port: 3306
2018-12-19 22:33:23 31032 [Note] IPv6 is available.
2018-12-19 22:33:23 31032 [Note]   - & # 39; :: & # 39; resolves in :: # ;;
2018-12-19 22:33:23 31032 [Note] Server Socket created on IP: & # 39; :: & # 39;
2018-12-19 22:33:23 31032 [Note] Event planner: events loaded 0
2018-12-19 22:33:23 31032 [Note] / usr / sbin / mysqld: ready for connections.
Version: socket 5.6.42: port & # 39; /var/lib/mysql/mysql.sock: 3306 MySQL Community Server (GPL)
2018-12-19 22:33:55 31032 [Note] / usr / sbin / mysqld: normal shutdown

2018-12-19 22:33:55 31032 [Note] Give 0 client threads a chance to die gracefully
2018-12-19 22:33:55 31032 [Note] Event Planner: Purging the Queue. 0 events
2018-12-19 22:33:55 31032 [Note] Stopping slave threads
2018-12-19 22:33:55 31032 [Note] Strongly disconnect from 0 remaining client
2018-12-19 22:33:55 31032 [Note] Binlog end
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; partition & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_DATAFILES & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_TABLESPACES & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_FOREIGN_COLS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_FOREIGN & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_FIELDS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_COLUMNS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin - INNODB_SYS_INDEXES & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin - INNODB_SYS_TABLESTATS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_SYS_TABLES & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_FT_INDEX_TABLE & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_FT_INDEX_CACHE & # 39;
2018-12-19 22:33:55 31032 [Note] Stop the plugin 'INNODB_FT_CONFIG & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_FT_BEING_DELETED & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_FT_DELETED & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_FT_DEFAULT_STOPWORD & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_METRICS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_BUFFER_POOL_STATS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_BUFFER_PAGE_LRU & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_BUFFER_PAGE & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMP_PER_INDEX_RESET & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMP_PER_INDEX & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMPMEM_RESET & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMPMEM & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMP_RESET & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_CMP & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_LOCK_WAITS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_LOCKS & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; INNODB_TRX & # 39;
2018-12-19 22:33:55 31032 [Note] Closing the plugin & # 39; InnoDB & # 39;
2018-12-19 22:33:55 31032 [Note] InnoDB: FTS optimizes thread output.
2018-12-19 22:33:55 31032 [Note] InnoDB: Starting the shutdown ...
2018-12-19 22:33:56 31032 [Note] InnoDB: stop completed; log sequence number 4940380617
2018-12-19 22:33:56 31032 [Note] Closing the plugin 'PERFORMANCE_SCHEMA & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; BLACKHOLE & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; ARCHIVE & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; MyISAM & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; CSV & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; MEMORY & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; MRG_MYISAM & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; sha256_password & # 39;
2018-12-19 22:33:56 31032 [Note] Stop the plugin & # 39; mysql_old_password & # 39;
2018-12-19 22:33:56 31032 [Note] Stop the plugin & # 39; mysql_native_password & # 39;
2018-12-19 22:33:56 31032 [Note] Closing the plugin & # 39; binlog & # 39;
2018-12-19 22:33:56 31032 [Note] / usr / sbin / mysqld: full stop

// Start mysqld with the comment innodb_force_recovery = 3 in my.cnf.

2018-12-19 22:35:04 31471 [Note] The plugin & # 39; FEDERATED & # 39; is disabled.
2018-12-19 22:35:04 31471 [Note] InnoDB: Using atomics to reference buffer pool pages
2018-12-19 22:35:04 31471 [Note] InnoDB: the InnoDB memory segment is deactivated
2018-12-19 22:35:04 31471 [Note] InnoDB: mutex and rw_locks use GCC atomic coding
2018-12-19 22:35:04 31471 [Note] InnoDB: the memory barrier is not used
2018-12-19 22:35:04 31471 [Note] InnoDB: Compressed tables use zlib 1.2.11
2018-12-19 22:35:04 31471 [Note] InnoDB: Using the native Linux AIO
2018-12-19 22:35:04 31471 [Note] InnoDB: Using CPU crc32 instructions
2018-12-19 22:35:04 31471 [Note] InnoDB: Initializing the buffer pool, size = 128.0M
2018-12-19 22:35:04 31471 [Note] InnoDB: end of buffer pool initialization
2018-12-19 22:35:04 31471 [Note] InnoDB: The most supported file format is Barracuda.
2018-12-19 22:35:04 31471 [Note] InnoDB: 128 cancellation segments are active.
2018-12-19 22:35:04 31471 [Note] InnoDB: Waiting for the purge to begin
InnoDB: Error: The id of the tablespace is 94 in the data dictionary
InnoDB: but in the file ./mysql/innodb_table_stats.ibd it is 1!
2018-12-19 22:35:04 InnoDB 7fd0d6bfd700: Assertion failed in thread 140534932821760 in file fil0fil.cc line 797
InnoDB: We are intentionally generating a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you experience repeated assertion failures or crashes, even
InnoDB: immediately after starting mysqld, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
InnoDB: to force recovery.
13:35:04 UTC - mysqld received signal 6;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries to which it was linked is corrupt, poorly constructed,
or wrongly configured. This error can also be caused by hardware malfunction.
We will do our best to collect information that will hopefully help
diagnose the problem, but since we have already crashed,
Something is really wrong and it can fail.

key_buffer_size = 8388608
read_buffer_size = 131072
max_used_connections = 0
max_threads = 151
thread_count = 0
number_connection = 0
It is possible that mysqld uses up to
key_buffer_size + (read_buffer_size + sort_buffer_size) * max_threads = 68108 KB of memory
I hope it goes otherwise, decreases some variables of the equation.

Thread pointer: 0x0
Trace attempt. You can use the following information to discover
where mysqld died. If you do not see any message after that, something has happened
terribly wrong ...
stack_bottom = 0 thread_stack 0x40000
/ usr / sbin / mysqld (my_print_stacktrace + 0x35)[0x8e7635]
/ usr / sbin / mysqld (handle_fatal_signal + 0x494)[0x669414]
/lib64/libpthread.so.0(+0xf7e0)[0x7fd1089077e0]
/lib64/libc.so.6(gsignal+0x35)[0x7fd1073a74f5]
/lib64/libc.so.6(abort+0x175)[0x7fd1073a8cd5]
/ usr / sbin / mysqld[0xa9dc66]
/ usr / sbin / mysqld[0xa9dcc5]
/ usr / sbin / mysqld[0xa9e0a6]
/ usr / sbin / mysqld[0xa6c7bd]
/ usr / sbin / mysqld[0xa6cf2b]
/ usr / sbin / mysqld[0xa5aee1]
/ usr / sbin / mysqld[0xa4655a]
/ usr / sbin / mysqld[0x9e7848]
/ usr / sbin / mysqld[0x9e4f5d]
/ usr / sbin / mysqld[0x9e510c]
/ usr / sbin / mysqld[0x9e7041]
/ usr / sbin / mysqld[0x9b5305]
/ usr / sbin / mysqld[0xa1056b]
/ usr / sbin / mysqld[0xa014e7]
/lib64/libpthread.so.0(+0x7aa1)[0x7fd1088ffaa1]
/lib64/libc.so.6(clone+0x6d)[0x7fd10745dc4d]
The man page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you discover the cause of the crash.

Help me, please.