MySQL でパフォーマンスの問題があります。データベースには約 400,000 のレコードが含まれており、サイトは Drupal で実行され、すべての列にはインデックスがあります。残念ながら、一部の広告にはすべてのデータが含まれていないため、INNER JOIN の代わりに LEFT JOIN を使用する必要があります。
意見:
CREATE VIEW cases_view AS SELECT
n.nid AS nid,
n.created AS created,
n.type AS type,
n.status AS status,
i.field_adpersonid_value AS field_adpersonid_value,
f.field_adpersonname_value AS field_adpersonname_value,
l.field_adpersonfamilyname_value AS field_adpersonfamilyname_value,
b.field_adpersondateofborn_value AS field_adpersondateofborn_value,
d.field_adpersondateofdied_value AS field_adpersondateofdied_value,
p.field_adnewspapergroupname_value AS field_adnewspapergroupname,
c.field_sbfcompanyname_value AS field_sbfcompanyname_value
FROM
node n
LEFT JOIN field_data_field_adpersonname f ON (f.entity_id = n.nid)
JOIN field_data_field_adpersonid i ON (i.entity_id = n.nid)
LEFT JOIN field_data_field_adpersonfamilyname l ON (l.entity_id = n.nid)
LEFT JOIN field_data_field_adpersondateofborn b ON (b.entity_id = n.nid)
LEFT JOIN field_data_field_adpersondateofdied d ON (d.entity_id = n.nid)
LEFT JOIN field_data_field_adnewspapergroupname p ON (p.entity_id = n.nid)
LEFT JOIN field_data_field_sbfcompanyname c ON (c.entity_id = n.nid)
WHERE
n.type = 'advertisement' AND n.status = 1 AND `p`.`field_adnewspapergroupname_value` <> 'Times Newspaper'
次に、このビュー (php) で次のクエリを使用してデータを検索します。
SELECT DISTINCT v.field_adpersonname_value AS field_adpersonname_value, v.field_adpersonid_value AS field_adpersonid_value, v.field_adpersonfamilyname_value AS field_adpersonfamilyname_value, v.field_adpersondateofborn_value AS field_adpersondateofborn_value, v.field_adpersondateofdied_value AS field_adpersondateofdied_value, v.field_sbfcompanyname_value AS field_sbfcompanyname_value
FROM
cases_view v
WHERE (v.field_adpersonname_value LIKE 'Sample name%' ESCAPE '\\') AND (v.field_adpersonfamilyname_value LIKE '%' ESCAPE '\\') AND (v.field_adpersondateofborn_value LIKE '%' ESCAPE '\\') AND (v.field_adpersondateofdied_value LIKE '%' ESCAPE '\\')
ORDER BY v.field_adpersonfamilyname_value ASC, v.field_adpersondateofdied_value DESC
LIMIT 20 OFFSET 0
私のデータベース構成:
max_connections = 300
connect_timeout = 100
max_user_connections = 300
key_buffer = 256M
query_cache_size = 96MB
query_cache_limit = 4MB
table_cache = 1800
table_definition_cache = 1800
sort_buffer_size = 32M
myisam_sort_buffer_size = 32M
tmp_table_size = 64MB
join_buffer_size = 4M
wait_timeout = 60
innodb_buffer_pool_size = 2G
innodb_log_file_size = 1G
max_heap_table_size = 128M
tmp_table_size = 128M
max_allowed_packet = 32M
thread_cache_size = 128
mysqlサーバーサイトを起動すると検索は高速ですが、数時間後に「tmpテーブルへのコピー」がデータのコピーを開始し、サーバーが遅くなり、最終的にクラッシュします。システムには 8GB の RAM とそのデュアルコアがあります。
助けてください!