EDIT: ho avuto questa domanda originariamente pubblicata su StackOverflow a cui non è mai stata data una risposta completa, sto pubblicando qui nella speranza di far luce sul perché le enormi scansioni del tavolo e tutti i mezzi per prevenirle con cambiamenti minimi (si spera) minimi.
Magento Enterprise. 1.10.1.1. Il set di dati di clienti e indirizzi sono CSR semi-grandi (125k +) sono spesso su questa griglia (a volte più di 25 utenti contemporaneamente alla volta).
Ecco lo snippet di codice in cui la raccolta viene generata nel Grid.php
Block
file Cliente . Niente di speciale o fuori dall'ordinario, semplicemente aggiungendo principalmente attributi alla collezione.
$collection = Mage::getResourceModel('customer/customer_collection')
->addNameToSelect()
->addAttributeToSelect('email')
->addAttributeToSelect('group_id')
->addAttributeToSelect('prod_codes')
->addAttributeToSelect('last_called_date')
->addAttributeToSelect('time_zone')
->addAttributeToSelect('salesrep')
->addAttributeToSelect('do_not_call')
->addAttributeToSelect('club_member')
->addAttributeToSelect('call_back_date')
->addAttributeToSelect('marketing_code_outcome')
->joinAttribute('billing_postcode', 'customer_address/postcode', 'default_billing', null, 'left')
->joinAttribute('billing_city', 'customer_address/city', 'default_billing', null, 'left')
->joinAttribute('billing_telephone', 'customer_address/telephone', 'default_billing', null, 'left')
->joinAttribute('billing_region', 'customer_address/region', 'default_billing', null, 'left');
$this->setCollection($collection);
Genera questa query, che si comporta in modo anomalo causando tempi di caricamento molto lunghi nella griglia del cliente:
SELECT
e . *,
_table_prefix.value AS prefix,
_table_firstname.value AS firstname,
_table_middlename.value AS middlename,
_table_lastname.value AS lastname,
_table_suffix.value AS suffix,
CONCAT(IF(_table_prefix.value IS NOT NULL AND _table_prefix.value != '',
CONCAT(TRIM(_table_prefix.value), ' '),
''),
TRIM(_table_firstname.value),
IF(_table_middlename.value IS NOT NULL AND _table_middlename.value != '',
CONCAT(' ', TRIM(_table_middlename.value)),
''),
' ',
TRIM(_table_lastname.value),
IF(_table_suffix.value IS NOT NULL AND _table_suffix.value != '',
CONCAT(' ', TRIM(_table_suffix.value)),
'')) AS name,
_table_default_billing.value AS default_billing,
_table_billing_postcode.value AS billing_postcode,
_table_billing_city.value AS billing_city,
_table_billing_telephone.value AS billing_telephone,
_table_billing_region.value AS billing_region
FROM
customer_entity AS e
LEFT JOIN
customer_entity_varchar AS _table_prefix ON (_table_prefix.entity_id = e.entity_id) AND (_table_prefix.attribute_id = '4')
LEFT JOIN
customer_entity_varchar AS _table_firstname ON (_table_firstname.entity_id = e.entity_id) AND (_table_firstname.attribute_id = '5')
LEFT JOIN
customer_entity_varchar AS _table_middlename ON (_table_middlename.entity_id = e.entity_id) AND (_table_middlename.attribute_id = '6')
LEFT JOIN
customer_entity_varchar AS _table_lastname ON (_table_lastname.entity_id = e.entity_id) AND (_table_lastname.attribute_id = '7')
LEFT JOIN
customer_entity_varchar AS _table_suffix ON (_table_suffix.entity_id = e.entity_id) AND (_table_suffix.attribute_id = '8')
LEFT JOIN
customer_entity_int AS _table_default_billing ON (_table_default_billing.entity_id = e.entity_id) AND (_table_default_billing.attribute_id = '13')
LEFT JOIN
customer_address_entity_varchar AS _table_billing_postcode ON (_table_billing_postcode.entity_id = _table_default_billing.value) AND (_table_billing_postcode.attribute_id = '29')
LEFT JOIN
customer_address_entity_varchar AS _table_billing_city ON (_table_billing_city.entity_id = _table_default_billing.value) AND (_table_billing_city.attribute_id = '25')
LEFT JOIN
customer_address_entity_varchar AS _table_billing_telephone ON (_table_billing_telephone.entity_id = _table_default_billing.value) AND (_table_billing_telephone.attribute_id = '30')
LEFT JOIN
customer_address_entity_varchar AS _table_billing_region ON (_table_billing_region.entity_id = _table_default_billing.value) AND (_table_billing_region.attribute_id = '27')
WHERE
(e.entity_type_id = '1')
ORDER BY CONCAT(IF(_table_prefix.value IS NOT NULL AND _table_prefix.value != '',
CONCAT(TRIM(_table_prefix.value), ' '),
''),
TRIM(_table_firstname.value),
IF(_table_middlename.value IS NOT NULL AND _table_middlename.value != '',
CONCAT(' ', TRIM(_table_middlename.value)),
''),
' ',
TRIM(_table_lastname.value),
IF(_table_suffix.value IS NOT NULL AND _table_suffix.value != '',
CONCAT(' ', TRIM(_table_suffix.value)),
'')) desc
LIMIT 20 OFFSET 60
un EXPLAIN
sulla query mostra, NOTA l'Extra sulla tabella e, Utilizzo temporaneo e Utilizzo di filesort :
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: e
type: ref
possible_keys: IDX_ENTITY_TYPE
key: IDX_ENTITY_TYPE
key_len: 2
ref: const
rows: 55556
Extra: Using temporary; Using filesort
*************************** 2. row ***************************
id: 1
select_type: SIMPLE
table: _table_prefix
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_VARCHAR_ATTRIBUTE,FK_CUSTOMER_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 3. row ***************************
id: 1
select_type: SIMPLE
table: _table_firstname
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_VARCHAR_ATTRIBUTE,FK_CUSTOMER_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 4. row ***************************
id: 1
select_type: SIMPLE
table: _table_middlename
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_VARCHAR_ATTRIBUTE,FK_CUSTOMER_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 5. row ***************************
id: 1
select_type: SIMPLE
table: _table_lastname
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_VARCHAR_ATTRIBUTE,FK_CUSTOMER_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 6. row ***************************
id: 1
select_type: SIMPLE
table: _table_suffix
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_VARCHAR_ATTRIBUTE,FK_CUSTOMER_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 7. row ***************************
id: 1
select_type: SIMPLE
table: _table_default_billing
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_INT_ATTRIBUTE,FK_CUSTOMER_INT_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod.e.entity_id,const
rows: 1
Extra:
*************************** 8. row ***************************
id: 1
select_type: SIMPLE
table: _table_billing_postcode
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_ADDRESS_VARCHAR_ATTRIBUTE,FK_CUSTOMER_ADDRESS_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod._table_default_billing.value,const
rows: 1
Extra:
*************************** 9. row ***************************
id: 1
select_type: SIMPLE
table: _table_billing_city
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_ADDRESS_VARCHAR_ATTRIBUTE,FK_CUSTOMER_ADDRESS_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod._table_default_billing.value,const
rows: 1
Extra:
*************************** 10. row ***************************
id: 1
select_type: SIMPLE
table: _table_billing_telephone
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_ADDRESS_VARCHAR_ATTRIBUTE,FK_CUSTOMER_ADDRESS_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod._table_default_billing.value,const
rows: 1
Extra:
*************************** 11. row ***************************
id: 1
select_type: SIMPLE
table: _table_billing_region
type: eq_ref
possible_keys: IDX_ATTRIBUTE_VALUE,FK_CUSTOMER_ADDRESS_VARCHAR_ATTRIBUTE,FK_CUSTOMER_ADDRESS_VARCHAR_ENTITY,IDX_VALUE
key: IDX_ATTRIBUTE_VALUE
key_len: 6
ref: prod._table_default_billing.value,const
rows: 1
Extra:
11 rows in set (0.00 sec)
Nessun indice è stato modificato diverso da quelli predefiniti da Magento stessi per 1.10.1 Vedi la Struttura della 1.5.1 (CE) qui: http://www.magereverse.com/index/magento-sql-structure/version/1- 5-1-0
Ecco la tabella degli alias riferita ad AS e. sulla scansione:
CREATE TABLE `customer_entity` (
`entity_id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
`entity_type_id` SMALLINT(8) UNSIGNED NOT NULL DEFAULT '0',
`attribute_set_id` SMALLINT(5) UNSIGNED NOT NULL DEFAULT '0',
`website_id` SMALLINT(5) UNSIGNED NULL DEFAULT NULL,
`email` VARCHAR(255) NOT NULL DEFAULT '',
`group_id` SMALLINT(3) UNSIGNED NOT NULL DEFAULT '0',
`increment_id` VARCHAR(50) NOT NULL DEFAULT '',
`store_id` SMALLINT(5) UNSIGNED NULL DEFAULT '0',
`created_at` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`is_active` TINYINT(1) UNSIGNED NOT NULL DEFAULT '1',
PRIMARY KEY (`entity_id`),
INDEX `FK_CUSTOMER_ENTITY_STORE` (`store_id`),
INDEX `IDX_ENTITY_TYPE` (`entity_type_id`),
INDEX `IDX_AUTH` (`email`, `website_id`),
INDEX `FK_CUSTOMER_WEBSITE` (`website_id`),
CONSTRAINT `FK_CUSTOMER_ENTITY_STORE` FOREIGN KEY (`store_id`) REFERENCES `core_store` (`store_id`) ON UPDATE CASCADE ON DELETE SET NULL,
CONSTRAINT `FK_CUSTOMER_WEBSITE` FOREIGN KEY (`website_id`) REFERENCES `core_website` (`website_id`) ON UPDATE CASCADE ON DELETE SET NULL
)
Quindi la domanda è come posso ottenere questa query per funzionare meglio e non causare la creazione e la scansione delle tabelle temporanee.
Non sono esattamente sicuro di cosa posso indicizzare per migliorare le prestazioni di queste query e non voglio scavare troppo nella modifica dell'ORM di Magento.
ORDER BY
clausola e sull'unione del primo, cognome, prefisso. Il mio piano originale era semplicemente appiattire il cliente, indirizzare le tabelle e riscrivere parte della logica, queste altre due opzioni sembrano essere più veloci e più facili da implementare. grazie ancora.