Re: File full error in simple select statement
Posted by: Peter Brawley
Date: April 28, 2021 08:32AM

You didn't say if this errors out ...

Create table tmp
  select w.weekend, d2.code as family, d2.amount
  from weekendings w  
  join dr02        d2 on (w.weekend >= d2.date and d2.t1 <> "g") 
                      or (w.weekend >= d2.weekend and d2.t1 = "g")
  where d2.amount is not null;
select weekend, code, sum(amount) as owing
from tmp
group by weekend, code
order by weekend, code

How much RAM?

Set tmp_table_size=15G

These are innodb tables, right?

Set innodb_buffer_pool_size= three quarters of available ram

Current wisdom is to leave multi-core optimisation to MySQL with ...

innodb_thread_concurrency = 0
innodb_read_io_threads = 64
innodb_write_io_threads = 64

Restart the server, While the query is running, run ...

show engine innodb status\G

... and post the result here if the error still occurs.

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Re: File full error in simple select statement
April 28, 2021 08:32AM


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