MySQL Forums
Forum List  »  InnoDB

Re: innodb_buffer_pool_size MySQL Windows question
Posted by: Peter Brawley
Date: April 01, 2020 08:36AM

What is the MySQL version? OS and version? How much of your 4GB RAM 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;

if mysql 5.7 or later ...

select * from sys.memory_global_total;

select 
  substring_index(event_name,'/',2) as code_area, 
  sys.format_bytes( sum(current_alloc) ) as current_alloc 
from sys.x$memory_global_by_current_bytes 
group by substring_index(event_name,'/',2) 
order by sum(current_alloc) desc;

select 
  concat(format(a.num * 100.0 / b.num,2),"%") bufferpoolfullpct 
from 
  (select variable_value num from performance_schema.global_status
  where variable_name = 'innodb_buffer_pool_pages_data') a,
  (select variable_value num from performance_schema.global_status
  where variable_name = 'innodb_buffer_pool_pages_total') b;

... and look for runaway mem use in the results of ...

select * 
from performance_schema.memory_summary_global_by_event_name
where event_name like 'memory/performance_schema/%';

(iii) post the result of ...

free -m

or in Windows use systeminfo.

To get ready for optimising, turn on the slow query log if it's not already enabled.

Options: ReplyQuote


Subject
Views
Written By
Posted
Re: innodb_buffer_pool_size MySQL Windows question
42
April 01, 2020 08:36AM


Sorry, only registered users may post in this forum.

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.