210425 18:56:31 [ERROR] 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.

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: 10.5.9-MariaDB-1:10.5.9+maria~focal

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=25

max_threads=252

thread_count=35

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 685804 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

mysqld(my_print_stacktrace+0x32)[0x561fa0b33af2]

Printing to addr2line failed

mysqld(handle_fatal_signal+0x485)[0x561fa05896f5]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7f141501f3c0]

mysqld(+0xc70ebf)[0x561fa088eebf]

mysqld(handle_manager+0x15e)[0x561fa036be9e]

mysqld(+0xbc1c66)[0x561fa07dfc66]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x9609)[0x7f1415013609]

/lib/x86_64-linux-gnu/libc.so.6(clone+0x43)[0x7f1414c02293]

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 /var/lib/mysql

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        unlimited            unlimited            bytes

Max resident set          unlimited            unlimited            bytes

Max processes             unlimited            unlimited            processes

Max open files            1048576              1048576              files

Max locked memory         16777216             16777216             bytes

Max address space         unlimited            unlimited            bytes

Max file locks            unlimited            unlimited            locks

Max pending signals       59986                59986                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.%e.%p.%t

  galera.cnf: |

    [galera]

    user = mysql

    bind-address = 0.0.0.0

    default_storage_engine = InnoDB

    binlog_format = ROW

    innodb_autoinc_lock_mode = 2

    innodb_flush_log_at_trx_commit = 0

    query_cache_size = 0

    query_cache_type = 0

    binlog_cache_size = 61440

    # MariaDB Galera settings

    wsrep_on=ON

    wsrep_provider=/usr/lib/galera/libgalera_smm.so

    wsrep_sst_method=rsync

    wsrep_slave_threads=8

    wsrep_sync_wait=7

    # Cluster settings (automatically updated)

    wsrep_cluster_address=gcomm://

    wsrep_cluster_name=mysql

    wsrep_node_address=127.0.0.1

  mariadb.cnf: "[client]\ndefault-character-set = utf8\n[mysqld]\ncore-file\nunix_socket

    = OFF\nperformance_schema = ON\ncharacter-set-server = utf8\ncollation-server

    = utf8_general_ci\nignore-db-dirs = lost+found \nmax_connections = 250\ninteractive_timeout

    = 450 \nwait_timeout = 450\n# InnoDB tuning\ninnodb_buffer_pool_size = 7000MB\ninnodb_log_file_size

    = 1600MB\n"

-------- Performance Metrics -----------------------------------------------------------------------

[--] Up for: 11h 32m 3s (482K q [11.626 qps], 60K conn, TX: 800M, RX: 105M)

[--] Reads / Writes: 80% / 20%

[--] Binary logging is disabled

[--] Physical Memory     : 14.7G

[--] Max MySQL memory    : 11.8G

[--] Other process memory: 0B

[--] Total buffers: 7.2G global + 18.9M per thread (250 max threads)

[--] P_S Max memory usage: 72B

[--] Galera GCache Max memory usage: 128M

[OK] Maximum reached memory usage: 7.7G (52.38% of installed RAM)

[OK] Maximum possible memory usage: 11.8G (80.17% of installed RAM)

[OK] Overall possible memory usage with other process is compatible with memory available

[OK] Slow queries: 0% (0/482K)

[OK] Highest usage of available connections: 11% (29/250)

[OK] Aborted connections: 0.00%  (0/60012)

[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance

[OK] Query cache is disabled by default due to mutex contention on multiprocessor machines.

[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 1K sorts)

[!!] Joins performed without indexes: 1008

[OK] Temporary tables created on disk: 1% (804 on disk / 57K total)

[OK] Thread cache hit rate: 99% (38 created / 60K connections)

[OK] Table cache hit rate: 98% (530 open / 537 opened)

[OK] table_definition_cache(400) is upper than number of tables(383)

[OK] Open file limit used: 0% (60/32K)

[OK] Table locks acquired immediately: 100% (791 immediate / 791 locks)