MySQL Forums
Forum List  »  Performance

Re: MySQL 5.6 Maximum Database instance
Posted by: Peter Brawley
Date: June 07, 2019 07:42PM

A maximum limit of what? Database size? that's usually an OS issue. Performance? It's hard to reach the ceiling, but it's easy to misconfigure a MySQL instance.

Let's start with you posting what the mysql server error log writes for a recent restart that failed.

RAM settings need to be tailored to load & resources. What is innodb_buffer_pool_size? How much RAM does the machine have, how much is used by other processes?

Then please ...

(i) post the result of ...

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;

(ii) post the results of running these queries in the mysql client program ...

show variables;

show global status;

(iii) if this is Linux, post the result of ...

free -m

If it's windows, use the Performance Monitor to inspect swap file use, and post what you find.

Options: ReplyQuote


Subject
Views
Written By
Posted
Re: MySQL 5.6 Maximum Database instance
322
June 07, 2019 07:42PM


Sorry, you can't reply to this topic. It has been closed.

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.