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Akonadi Server Self-Test Report===============================
Test 1:  SUCCESS
--------
 
Database driver found.
Details: The QtSQL driver 'QMYSQL' is required by your current Akonadi server configuration and was found on your system.
 
File content of '/home/artix/.config/akonadi/akonadiserverrc':
[%General]
Driver=QMYSQL
 
[QMYSQL]
Host=
Name=akonadi
Options="UNIX_SOCKET=/run/user/1000/akonadi/mysql.socket"
ServerPath=/usr/bin/mysqld
StartServer=true
 
 
Test 2:  SUCCESS
--------
 
Akonadi is not running as root
Details: Akonadi is not running as a root/administrator user, which is the recommended setup for a secure system.
 
Test 3:  SUCCESS
--------
 
MySQL server found.
Details: You have currently configured Akonadi to use the MySQL server '/usr/bin/mysqld'.
Make sure you have the MySQL server installed, set the correct path and ensure you have the necessary read and execution rights on the server executable. The server executable is typically called 'mysqld'; its location varies depending on the distribution.
 
Test 4:  SUCCESS
--------
 
MySQL server is executable.
Details: MySQL server found: /usr/bin/mysqld  Ver 10.6.5-MariaDB for Linux on x86_64 (Artix Linux)
 
 
Test 5:  ERROR
--------
 
MySQL server log contains errors.
Details: The MySQL server error log file '<a href="/home/artix/.local/share/akonadi/db_data/mysql.err">/home/artix/.local/share/akonadi/db_data/mysql.err</a>' contains errors.
 
File content of '/home/artix/.local/share/akonadi/db_data/mysql.err':
2022-01-24 23:39:26 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2022-01-24 23:39:26 0 [Note] InnoDB: Number of pools: 1
2022-01-24 23:39:26 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
2022-01-24 23:39:26 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)
2022-01-24 23:39:26 0 [Note] InnoDB: Using Linux native AIO
2022-01-24 23:39:26 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
2022-01-24 23:39:26 0 [Note] InnoDB: Completed initialization of buffer pool
2022-01-24 23:39:26 0 [ERROR] InnoDB: The Auto-extending data file './ibdata1' is of a different size 0 pages than specified by innodb_data_file_path
2022-01-24 23:39:26 0 [ERROR] InnoDB: Operating system error number 22 in a file operation.
2022-01-24 23:39:26 0 [ERROR] InnoDB: Error number 22 means 'Invalid argument'
2022-01-24 23:39:26 0 [Note] InnoDB: Some operating system error numbers are described at https://mariadb.com/kb/en/library/operating-system-error-codes/
2022-01-24 23:39:26 0 [ERROR] InnoDB: File (unknown): 'close' returned OS error 222. Cannot continue operation
220124 23:39:26 [ERROR] mysqld got signal 6 ;
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.
 
To report this bug, see https://mariadb.com/kb/en/reporting-bugs
 
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.
 
Server version: 10.6.5-MariaDB
key_buffer_size=16384
read_buffer_size=131072
max_used_connections=0
max_threads=258
thread_count=0
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 568116 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
 
Thread pointer: 0x0
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 = 0x0 thread_stack 0x49000
??:0(my_print_stacktrace)[0x55d182d64583]
??:0(handle_fatal_signal)[0x55d18286bb7b]
sigaction.c:0(__restore_rt)[0x7ff07a1fd960]
:0(__GI_raise)[0x7ff079cdaef5]
:0(__GI_abort)[0x7ff079cc4862]
??:0(Wsrep_server_service::log_dummy_write_set(wsrep::client_state&, wsrep::ws_meta const&))[0x55d182507e3f]
??:0(std::unique_lock<std::mutex>::unlock())[0x55d182bba675]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182ccc1c9]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182cd01b4]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182cd0265]
??:0(Wsrep_server_service::log_dummy_write_set(wsrep::client_state&, wsrep::ws_meta const&))[0x55d18251c3ae]
??:0(wsrep_notify_status(wsrep::server_state::state, wsrep::view const*))[0x55d182b61c32]
??:0(ha_initialize_handlerton(st_plugin_int*))[0x55d18286e927]
??:0(sys_var_pluginvar::sys_var_pluginvar(sys_var_chain*, char const*, st_plugin_int*, st_mysql_sys_var*))[0x55d18265d7c9]
??:0(plugin_init(int*, char**, int))[0x55d18265e7e1]
??:0(unireg_abort)[0x55d1825840a8]
??:0(mysqld_main(int, char**))[0x55d182589eca]
??:0(__libc_start_main)[0x7ff079cc5b25]
??:0(_start)[0x55d18257ef9e]
The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /home/artix/.local/share/akonadi/db_data
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             15522                15522                processes 
Max open files            4096                 4096                 files     
Max locked memory         1048576              1048576              bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       15522                15522                signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us        
Core pattern: core
 
 
 
Test 6:  SUCCESS
--------
 
MySQL server default configuration found.
Details: The default configuration for the MySQL server was found and is readable at <a href="/etc/xdg//akonadi/mysql-global.conf">/etc/xdg//akonadi/mysql-global.conf</a>.
 
File content of '/etc/xdg//akonadi/mysql-global.conf':
#
# Global Akonadi MySQL server settings,
# These settings can be adjusted using $HOME/.config/akonadi/mysql-local.conf
#
# Based on advice by Kris Köhntopp <kris@mysql.com>
#
[mysqld]
 
# strict query parsing/interpretation
# TODO: make Akonadi work with those settings enabled
# sql_mode=strict_trans_tables,strict_all_tables,strict_error_for_division_by_zero,no_auto_create_user,no_auto_value_on_zero,no_engine_substitution,no_zero_date,no_zero_in_date,only_full_group_by,pipes_as_concat
# sql_mode=strict_trans_tables
 
# DEBUGGING:
# log all queries, useful for debugging but generates an enormous amount of data
# log=mysql.full
# log queries slower than n seconds, log file name relative to datadir (for debugging only)
# log_slow_queries=mysql.slow
# long_query_time=1
# log queries not using indices, debug only, disable for production use
# log_queries_not_using_indexes=1
#
# measure database size and adjust innodb_buffer_pool_size
# SELECT sum(data_length) as bla, sum(index_length) as blub FROM information_schema.tables WHERE table_schema not in ("mysql", "information_schema");
 
# NOTES:
# Keep Innob_log_waits and keep Innodb_buffer_pool_wait_free small (see show global status like "inno%", show global variables)
 
#expire_logs_days=3
 
#sync_bin_log=0
 
# Use UTF-8 encoding for tables
character_set_server=utf8
collation_server=utf8_general_ci
 
# use InnoDB for transactions and better crash recovery
default_storage_engine=innodb
 
# memory buffer InnoDB uses to cache data and indexes of its tables (default:128M)
# Larger values means less I/O
innodb_buffer_pool_size=128M
 
# Create a .ibd file for each table (default:0)
innodb_file_per_table=1
 
# Write out the log buffer to the log file at each commit (default:1)
innodb_flush_log_at_trx_commit=2
 
# Buffer size used to write to the log files on disk (default:1M for builtin, 8M for plugin)
# larger values means less I/O
innodb_log_buffer_size=1M
 
# Size of each log file in a log group (default:5M) larger means less I/O but more time for recovery.
innodb_log_file_size=64M
 
# # error log file name, relative to datadir (default:hostname.err)
log_error=mysql.err
 
# print warnings and connection errors (default:1)
loose_log_warnings=2
 
# Convert table named to lowercase
lower_case_table_names=1
 
# Maximum size of one packet or any generated/intermediate string. (default:1M)
max_allowed_packet=32M
 
# Maximum simultaneous connections allowed (default:100)
max_connections=256
 
# The two options below make no sense with prepared statements and/or transactions
# (make sense when having the same query multiple times)
 
# Memory allocated for caching query results (default:0 (disabled))
loose_query_cache_size=0
 
# Do not cache results (default:1)
loose_query_cache_type=0
 
# Do not use the privileges mechanisms
skip_grant_tables
 
# Do not listen for TCP/IP connections at all
skip_networking
 
# The number of open tables for all threads. (default:64)
table_open_cache=200
 
# How many threads the server should cache for reuse (default:0)
thread_cache_size=3
 
# wait 365d before dropping the DB connection (default:8h)
wait_timeout=31536000
 
# We use InnoDB, so don't let MyISAM eat up memory
key_buffer_size=16K
 
[client]
default-character-set=utf8
 
 
Test 7:  SKIP
--------
 
MySQL server custom configuration not available.
Details: The custom configuration for the MySQL server was not found but is optional.
 
Test 8:  SUCCESS
--------
 
MySQL server configuration is usable.
Details: The MySQL server configuration was found at <a href="/home/artix/.local/share/akonadi/mysql.conf">/home/artix/.local/share/akonadi/mysql.conf</a> and is readable.
 
File content of '/home/artix/.local/share/akonadi/mysql.conf':
#
# Global Akonadi MySQL server settings,
# These settings can be adjusted using $HOME/.config/akonadi/mysql-local.conf
#
# Based on advice by Kris Köhntopp <kris@mysql.com>
#
[mysqld]
 
# strict query parsing/interpretation
# TODO: make Akonadi work with those settings enabled
# sql_mode=strict_trans_tables,strict_all_tables,strict_error_for_division_by_zero,no_auto_create_user,no_auto_value_on_zero,no_engine_substitution,no_zero_date,no_zero_in_date,only_full_group_by,pipes_as_concat
# sql_mode=strict_trans_tables
 
# DEBUGGING:
# log all queries, useful for debugging but generates an enormous amount of data
# log=mysql.full
# log queries slower than n seconds, log file name relative to datadir (for debugging only)
# log_slow_queries=mysql.slow
# long_query_time=1
# log queries not using indices, debug only, disable for production use
# log_queries_not_using_indexes=1
#
# measure database size and adjust innodb_buffer_pool_size
# SELECT sum(data_length) as bla, sum(index_length) as blub FROM information_schema.tables WHERE table_schema not in ("mysql", "information_schema");
 
# NOTES:
# Keep Innob_log_waits and keep Innodb_buffer_pool_wait_free small (see show global status like "inno%", show global variables)
 
#expire_logs_days=3
 
#sync_bin_log=0
 
# Use UTF-8 encoding for tables
character_set_server=utf8
collation_server=utf8_general_ci
 
# use InnoDB for transactions and better crash recovery
default_storage_engine=innodb
 
# memory buffer InnoDB uses to cache data and indexes of its tables (default:128M)
# Larger values means less I/O
innodb_buffer_pool_size=128M
 
# Create a .ibd file for each table (default:0)
innodb_file_per_table=1
 
# Write out the log buffer to the log file at each commit (default:1)
innodb_flush_log_at_trx_commit=2
 
# Buffer size used to write to the log files on disk (default:1M for builtin, 8M for plugin)
# larger values means less I/O
innodb_log_buffer_size=1M
 
# Size of each log file in a log group (default:5M) larger means less I/O but more time for recovery.
innodb_log_file_size=64M
 
# # error log file name, relative to datadir (default:hostname.err)
log_error=mysql.err
 
# print warnings and connection errors (default:1)
loose_log_warnings=2
 
# Convert table named to lowercase
lower_case_table_names=1
 
# Maximum size of one packet or any generated/intermediate string. (default:1M)
max_allowed_packet=32M
 
# Maximum simultaneous connections allowed (default:100)
max_connections=256
 
# The two options below make no sense with prepared statements and/or transactions
# (make sense when having the same query multiple times)
 
# Memory allocated for caching query results (default:0 (disabled))
loose_query_cache_size=0
 
# Do not cache results (default:1)
loose_query_cache_type=0
 
# Do not use the privileges mechanisms
skip_grant_tables
 
# Do not listen for TCP/IP connections at all
skip_networking
 
# The number of open tables for all threads. (default:64)
table_open_cache=200
 
# How many threads the server should cache for reuse (default:0)
thread_cache_size=3
 
# wait 365d before dropping the DB connection (default:8h)
wait_timeout=31536000
 
# We use InnoDB, so don't let MyISAM eat up memory
key_buffer_size=16K
 
[client]
default-character-set=utf8
 
 
Test 9:  SUCCESS
--------
 
akonadictl found and usable
Details: The program '/usr/bin/akonadictl' to control the Akonadi server was found and could be executed successfully.
Result:
akonadictl 5.19.1 (21.12.1)
 
 
Test 10:  ERROR
--------
 
Akonadi control process not registered at D-Bus.
Details: The Akonadi control process is not registered at D-Bus which typically means it was not started or encountered a fatal error during startup.
 
Test 11:  ERROR
--------
 
Akonadi server process not registered at D-Bus.
Details: The Akonadi server process is not registered at D-Bus which typically means it was not started or encountered a fatal error during startup.
 
Test 12:  SKIP
--------
 
Protocol version check not possible.
Details: Without a connection to the server it is not possible to check if the protocol version meets the requirements.
 
Test 13:  ERROR
--------
 
No resource agents found.
Details: No resource agents have been found, Akonadi is not usable without at least one. This usually means that no resource agents are installed or that there is a setup problem. The following paths have been searched: '/usr/share/akonadi/agents'. The XDG_DATA_DIRS environment variable is set to ''; make sure this includes all paths where Akonadi agents are installed.
 
Directory listing of '/usr/share/akonadi/agents':
akonadiindexingagent.desktop
akonotesresource.desktop
archivemailagent.desktop
birthdaysresource.desktop
contactsresource.desktop
davgroupwareresource.desktop
etesyncresource.desktop
ewsmtaresource.desktop
ewsresource.desktop
followupreminder.desktop
googleresource.desktop
icaldirresource.desktop
icalresource.desktop
imapresource.desktop
kalarmdirresource.desktop
kalarmresource.desktop
knutresource.desktop
kolabresource.desktop
maildirresource.desktop
maildispatcheragent.desktop
mailfilteragent.desktop
mailmergeagent.desktop
mboxresource.desktop
migrationagent.desktop
mixedmaildirresource.desktop
newmailnotifieragent.desktop
notesagent.desktop
notesresource.desktop
openxchangeresource.desktop
pop3resource.desktop
sendlateragent.desktop
tomboynotesresource.desktop
unifiedmailboxagent.desktop
vcarddirresource.desktop
vcardresource.desktop
 
Environment variable XDG_DATA_DIRS is set to ''
 
Test 14:  SUCCESS
--------
 
No current Akonadi server error log found.
Details: The Akonadi server did not report any errors during its current startup.
 
Test 15:  SUCCESS
--------
 
No previous Akonadi server error log found.
Details: The Akonadi server did not report any errors during its previous startup.
 
Test 16:  SUCCESS
--------
 
No current Akonadi control error log found.
Details: The Akonadi control process did not report any errors during its current startup.
 
Test 17:  SUCCESS
--------
 
No previous Akonadi control error log found.
Details: The Akonadi control process did not report any errors during its previous startup.

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Akonadi Server Self-Test Report===============================
Test 1:  SUCCESS
--------

Database driver found.
Details: The QtSQL driver 'QMYSQL' is required by your current Akonadi server configuration and was found on your system.

File content of '/home/artix/.config/akonadi/akonadiserverrc':
[%General]
Driver=QMYSQL

[QMYSQL]
Host=
Name=akonadi
Options="UNIX_SOCKET=/run/user/1000/akonadi/mysql.socket"
ServerPath=/usr/bin/mysqld
StartServer=true

Test 2:  SUCCESS
--------

Akonadi is not running as root
Details: Akonadi is not running as a root/administrator user, which is the recommended setup for a secure system.

Test 3:  SUCCESS
--------

MySQL server found.
Details: You have currently configured Akonadi to use the MySQL server '/usr/bin/mysqld'.
Make sure you have the MySQL server installed, set the correct path and ensure you have the necessary read and execution rights on the server executable. The server executable is typically called 'mysqld'; its location varies depending on the distribution.

Test 4:  SUCCESS
--------

MySQL server is executable.
Details: MySQL server found: /usr/bin/mysqld  Ver 10.6.5-MariaDB for Linux on x86_64 (Artix Linux)

Test 5:  ERROR
--------

MySQL server log contains errors.
Details: The MySQL server error log file '<a href="/home/artix/.local/share/akonadi/db_data/mysql.err">/home/artix/.local/share/akonadi/db_data/mysql.err</a>' contains errors.

File content of '/home/artix/.local/share/akonadi/db_data/mysql.err':
2022-01-24 23:39:26 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2022-01-24 23:39:26 0 [Note] InnoDB: Number of pools: 1
2022-01-24 23:39:26 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
2022-01-24 23:39:26 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)
2022-01-24 23:39:26 0 [Note] InnoDB: Using Linux native AIO
2022-01-24 23:39:26 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
2022-01-24 23:39:26 0 [Note] InnoDB: Completed initialization of buffer pool
2022-01-24 23:39:26 0 [ERROR] InnoDB: The Auto-extending data file './ibdata1' is of a different size 0 pages than specified by innodb_data_file_path
2022-01-24 23:39:26 0 [ERROR] InnoDB: Operating system error number 22 in a file operation.
2022-01-24 23:39:26 0 [ERROR] InnoDB: Error number 22 means 'Invalid argument'
2022-01-24 23:39:26 0 [Note] InnoDB: Some operating system error numbers are described at https://mariadb.com/kb/en/library/operating-system-error-codes/
2022-01-24 23:39:26 0 [ERROR] InnoDB: File (unknown): 'close' returned OS error 222. Cannot continue operation
220124 23:39:26 [ERROR] mysqld got signal 6 ;
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.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

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.

Server version: 10.6.5-MariaDB
key_buffer_size=16384
read_buffer_size=131072
max_used_connections=0
max_threads=258
thread_count=0
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 568116 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0
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 = 0x0 thread_stack 0x49000
??:0(my_print_stacktrace)[0x55d182d64583]
??:0(handle_fatal_signal)[0x55d18286bb7b]
sigaction.c:0(__restore_rt)[0x7ff07a1fd960]
:0(__GI_raise)[0x7ff079cdaef5]
:0(__GI_abort)[0x7ff079cc4862]
??:0(Wsrep_server_service::log_dummy_write_set(wsrep::client_state&, wsrep::ws_meta const&))[0x55d182507e3f]
??:0(std::unique_lock<std::mutex>::unlock())[0x55d182bba675]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182ccc1c9]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182cd01b4]
??:0(void std::vector<unsigned long, std::allocator<unsigned long> >::_M_realloc_insert<unsigned long>(__gnu_cxx::__normal_iterator<unsigned long*, std::vector<unsigned long, std::allocator<unsigned long> > >, unsigned long&&))[0x55d182cd0265]
??:0(Wsrep_server_service::log_dummy_write_set(wsrep::client_state&, wsrep::ws_meta const&))[0x55d18251c3ae]
??:0(wsrep_notify_status(wsrep::server_state::state, wsrep::view const*))[0x55d182b61c32]
??:0(ha_initialize_handlerton(st_plugin_int*))[0x55d18286e927]
??:0(sys_var_pluginvar::sys_var_pluginvar(sys_var_chain*, char const*, st_plugin_int*, st_mysql_sys_var*))[0x55d18265d7c9]
??:0(plugin_init(int*, char**, int))[0x55d18265e7e1]
??:0(unireg_abort)[0x55d1825840a8]
??:0(mysqld_main(int, char**))[0x55d182589eca]
??:0(__libc_start_main)[0x7ff079cc5b25]
??:0(_start)[0x55d18257ef9e]
The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /home/artix/.local/share/akonadi/db_data
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             15522                15522                processes 
Max open files            4096                 4096                 files     
Max locked memory         1048576              1048576              bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       15522                15522                signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us        
Core pattern: core

Test 6:  SUCCESS
--------

MySQL server default configuration found.
Details: The default configuration for the MySQL server was found and is readable at <a href="/etc/xdg//akonadi/mysql-global.conf">/etc/xdg//akonadi/mysql-global.conf</a>.

File content of '/etc/xdg//akonadi/mysql-global.conf':
#
# Global Akonadi MySQL server settings,
# These settings can be adjusted using $HOME/.config/akonadi/mysql-local.conf
#
# Based on advice by Kris Köhntopp <kris@mysql.com>
#
[mysqld]

# strict query parsing/interpretation
# TODO: make Akonadi work with those settings enabled
# sql_mode=strict_trans_tables,strict_all_tables,strict_error_for_division_by_zero,no_auto_create_user,no_auto_value_on_zero,no_engine_substitution,no_zero_date,no_zero_in_date,only_full_group_by,pipes_as_concat
# sql_mode=strict_trans_tables

# DEBUGGING:
# log all queries, useful for debugging but generates an enormous amount of data
# log=mysql.full
# log queries slower than n seconds, log file name relative to datadir (for debugging only)
# log_slow_queries=mysql.slow
# long_query_time=1
# log queries not using indices, debug only, disable for production use
# log_queries_not_using_indexes=1
#
# measure database size and adjust innodb_buffer_pool_size
# SELECT sum(data_length) as bla, sum(index_length) as blub FROM information_schema.tables WHERE table_schema not in ("mysql", "information_schema");

# NOTES:
# Keep Innob_log_waits and keep Innodb_buffer_pool_wait_free small (see show global status like "inno%", show global variables)

#expire_logs_days=3

#sync_bin_log=0

# Use UTF-8 encoding for tables
character_set_server=utf8
collation_server=utf8_general_ci

# use InnoDB for transactions and better crash recovery
default_storage_engine=innodb

# memory buffer InnoDB uses to cache data and indexes of its tables (default:128M)
# Larger values means less I/O
innodb_buffer_pool_size=128M

# Create a .ibd file for each table (default:0)
innodb_file_per_table=1

# Write out the log buffer to the log file at each commit (default:1)
innodb_flush_log_at_trx_commit=2

# Buffer size used to write to the log files on disk (default:1M for builtin, 8M for plugin)
# larger values means less I/O
innodb_log_buffer_size=1M

# Size of each log file in a log group (default:5M) larger means less I/O but more time for recovery.
innodb_log_file_size=64M

# # error log file name, relative to datadir (default:hostname.err)
log_error=mysql.err

# print warnings and connection errors (default:1)
loose_log_warnings=2

# Convert table named to lowercase
lower_case_table_names=1

# Maximum size of one packet or any generated/intermediate string. (default:1M)
max_allowed_packet=32M

# Maximum simultaneous connections allowed (default:100)
max_connections=256

# The two options below make no sense with prepared statements and/or transactions
# (make sense when having the same query multiple times)

# Memory allocated for caching query results (default:0 (disabled))
loose_query_cache_size=0

# Do not cache results (default:1)
loose_query_cache_type=0

# Do not use the privileges mechanisms
skip_grant_tables

# Do not listen for TCP/IP connections at all
skip_networking

# The number of open tables for all threads. (default:64)
table_open_cache=200

# How many threads the server should cache for reuse (default:0)
thread_cache_size=3

# wait 365d before dropping the DB connection (default:8h)
wait_timeout=31536000

# We use InnoDB, so don't let MyISAM eat up memory
key_buffer_size=16K

[client]
default-character-set=utf8

Test 7:  SKIP
--------

MySQL server custom configuration not available.
Details: The custom configuration for the MySQL server was not found but is optional.

Test 8:  SUCCESS
--------

MySQL server configuration is usable.
Details: The MySQL server configuration was found at <a href="/home/artix/.local/share/akonadi/mysql.conf">/home/artix/.local/share/akonadi/mysql.conf</a> and is readable.

File content of '/home/artix/.local/share/akonadi/mysql.conf':
#
# Global Akonadi MySQL server settings,
# These settings can be adjusted using $HOME/.config/akonadi/mysql-local.conf
#
# Based on advice by Kris Köhntopp <kris@mysql.com>
#
[mysqld]