mysql - Slow performance on joining table -


i trying optimize query below , have study how add index improve peformance , result still slow. query below took 20 sec run , transaction contains around 100k records , joining table transactiondetail contains around 500k records. 

    select transaction.id ....     transaction     inner join agent on agent.id = transaction.agent_id     inner join distributor on distributor.id = transaction.distributor_id     inner join transactiondetail on transaction.id = transactiondetail.transaction_id     transactiondetail.type =  'admin'     , transaction.status in ('pending',  'processing',  'success',  'rejected')     order issued_date desc limit 0 , 10

from query above try apply understand indexing

  1. i added 3 index because of inner join , transaction(agent_id,distributor_id) , transaction(transaction_id)

  2. from clause added transaction(status)

  3. because of order added transaction(issued_date)

but doesn't show improvement below explain

enter image description here

and screenshot phpmyadmin show indexing table transaction

enter image description here

is there way improvement query? or optimised , should focus on mysql configuration?

your query

select transaction.id .... transaction inner join agent on agent.id = transaction.agent_id inner join distributor on distributor.id = transaction.distributor_id inner join transactiondetail on transaction.id = transactiondetail.transaction_id transactiondetail.type =  'admin' , transaction.status in ('pending',  'processing',  'success',  'rejected') order issued_date desc limit 0 , 10

now have indexes applied on tables good, in clause more or , creates real performance issue. in case of small data-set not observed in large data-set performance dropped significantly.

one method of optimizing convert in clause union works better or in

(  select transaction.id ....  transaction  inner join agent on agent.id = transaction.agent_id  inner join distributor on distributor.id = transaction.distributor_id  inner join transactiondetail on transaction.id = transactiondetail.transaction_id  transactiondetail.type =  'admin'  , transaction.status = 'pending' ) union (  select transaction.id ....  transaction  inner join agent on agent.id = transaction.agent_id  inner join distributor on distributor.id = transaction.distributor_id  inner join transactiondetail on transaction.id = transactiondetail.transaction_id  transactiondetail.type =  'admin'  , transaction.status = 'processing' ) union (  select transaction.id ....  transaction  inner join agent on agent.id = transaction.agent_id  inner join distributor on distributor.id = transaction.distributor_id  inner join transactiondetail on transaction.id = transactiondetail.transaction_id  transactiondetail.type =  'admin'  , transaction.status = 'success' ) union (  select transaction.id ....  transaction  inner join agent on agent.id = transaction.agent_id  inner join distributor on distributor.id = transaction.distributor_id  inner join transactiondetail on transaction.id = transactiondetail.transaction_id  transactiondetail.type =  'admin'  , transaction.status = 'rejected' ) order issued_date desc limit 0 , 10

for resolving order may need add index as

alter table transaction add index status_created_idx(status,issued_date);

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