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Re: mysql 8.0.27 went crash
Posted by: Peter Brawley
Date: April 19, 2022 10:58PM

Does it slow down before it crashes? How big is the swap file? How much RAM is available to MySQL?

Can you post the result of this qty?

innodb_ft_total_cache_size +
innodb_additional_mem_pool_size +
innodb_log_buffer_size +
tmp_table_size +
key_buffer_size +
max_connections * (
thread_stack
+ max( max_allowed_packet, net_buffer_length )
+ net_buffer_length
+ read_buffer_size
+ read_rnd_buffer_size
+ sort_buffer_size
+ join_buffer_size
)

and the result of this query ...

select engine,data,indexes,total
from (
  select 
    ifnull(engine,'TOTALS') as engine, 
    concat(data,' GB') as data, 
    concat(indexes,' GB') as indexes, 
    concat(tot,' GB') as total,
    if(engine is null,-1,tot) as ord
  from (
    select   
      engine,  
      round( sum(data_length)/1024/1024/1024, 2 ) as data,  
      round( sum(index_length)/1024/1024/1024, 2 ) as indexes,  
      round( sum(data_length+index_length)/1024/1024/1024, 2 ) as tot
    from information_schema.tables
    where engine is not null and engine not in('information_schema','performance_schema')
    group by engine with rollup
  ) sums
) list
order by list.ord desc;

Or alternatively run the process described under "Optimisation cheatsheet" at https://www.artfulsoftware.com/infotree/mysqltips.php and post the result inside BBCode code tags.

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