EDIT: Saya punya pertanyaan ini awalnya diposting di Stackoverflow yang tidak pernah sepenuhnya dijawab, saya posting di sini dengan harapan untuk menjelaskan lagi mengapa tabel besar memindai dan segala cara untuk mencegahnya dengan (semoga) perubahan inti minimal.
Magento Enterprise. 1.10.1.1. Kumpulan data pelanggan dan alamat semi-besar (125k +) CSR sering kali berada di grid ini (kadang-kadang 25+ pengguna secara bersamaan).
Berikut ini cuplikan kode ketika koleksi sedang dibuat dalam Grid.php
Block
file Pelanggan . Tidak ada yang mewah atau tidak biasa, hanya menambahkan atribut ke koleksi terutama.
$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);
Menghasilkan kueri ini, yang mengalami gangguan yang menyebabkan waktu muat sangat lama saat berada di kisi pelanggan:
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
a EXPLAIN
pada permintaan menunjukkan, CATATAN Ekstra di atas tabel e, Menggunakan filesort sementara dan Menggunakan :
*************************** 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)
Tidak ada indeks yang telah dimodifikasi selain dari standar Magento sendiri untuk 1.10.1 Lihat Struktur 1.5.1 (CE) di sini: http://www.magereverse.com/index/magento-sql-structure/version/1- 5-1-0
Berikut adalah tabel alias yang disebut AS e. pada pemindaian:
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
)
Jadi pertanyaannya adalah bagaimana saya bisa membuat kueri ini berkinerja lebih baik dan tidak menyebabkan tabel sementara dibuat dan dipindai.
Saya tidak yakin apa yang dapat saya indeks untuk meningkatkan kinerja permintaan ini, dan saya tidak ingin menggali terlalu banyak dalam memodifikasi ORM Magento.
ORDER BY
klausa dan penggabungan awalan pertama, nama belakang,. Rencana awal saya adalah hanya meratakan pelanggan, tabel alamat dan menulis ulang beberapa logika, dua opsi lain ini terdengar lebih cepat dan lebih mudah diimplementasikan. Terima kasih lagi.