Ho un sito internet che contiene oltre i 6000 articoli fatto con joomla 2.5 .
Giorni fà mi hanno segnalato che alcune query mysql impiegano oltre i 2-3 secondi.
Dopo 1 giorno di test e cavoli vari... sono arrivato alla conclusione che queste query incriminate sono date dalla visualizzazione a blog.
Le query in questione sono 2 .
Praticamente la prima serve per visionare gli articoli nella pagina e vi è il limit , la seconda credo che serva per la paginazione.
Procendendo sulle varie pagine queste query vengo eseguite sempre.
Una soluzione adottata temporaneamente è la cache di sistema.
Ma vorrei sapere se anche altri hanno ricontrato questo problema e magari lo hanno risolto in qualche modo. !!!???
devo mettere fisicamente mano alla query ?
Nn mi è possibile mantenere un sito con oltre 3000visitatori univoci al giorno il quale esegua query di oltre 1 sec.
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Query
- SELECT a.id, a.title, a.alias, a.title_alias, a.introtext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias,
CASE WHEN a.modified = 0 THEN a.created ELSE a.modified END as modified, a.modified_by, uam.name as modified_by_name,
CASE WHEN a.publish_up = 0 THEN a.created ELSE a.publish_up END as publish_up,a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, LENGTH(a.fulltext) AS readmore,
CASE WHEN badcats.id is not null THEN 0 ELSE a.state END AS state,c.title AS category_title, c.path AS category_route, c.access AS category_access, c.alias AS category_alias,
CASE WHEN a.created_by_alias > ' ' THEN a.created_by_alias ELSE ua.name END AS author,ua.email AS author_email,contact.id as contactid,parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating, v.rating_count as rating_count,c.published,
CASE WHEN badcats.id is null THEN c.published ELSE 0 END AS parents_published
FROM d14w2_content AS a
LEFT JOIN d14w2_categories AS c
ON c.id = a.catid
LEFT JOIN d14w2_users AS ua
ON ua.id = a.created_by
LEFT JOIN d14w2_users AS uam
ON uam.id = a.modified_by
LEFT JOIN ( SELECT contact.user_id, MAX(contact.id) AS id, contact.language
FROM d14w2_contact_details AS contact
WHERE contact.published = 1
GROUP BY contact.user_id, contact.language) AS contact
ON contact.user_id = a.created_by
LEFT JOIN d14w2_categories as parent
ON parent.id = c.parent_id
LEFT JOIN d14w2_content_rating AS v
ON a.id = v.content_id
LEFT
OUTER JOIN (SELECT cat.id as id
FROM d14w2_categories AS cat JOIN d14w2_categories AS parent
ON cat.lft BETWEEN parent.lft
AND parent.rgt
WHERE parent.extension = 'com_content'
AND parent.published != 1
GROUP BY cat.id ) AS badcats
ON badcats.id = c.id
INNER JOIN d14w2_content_frontpage AS fp
ON fp.content_id = a.id
WHERE a.access IN (1,1)
AND c.access IN (1,1)
AND
CASE WHEN badcats.id is null THEN a.state ELSE 0 END = 1
AND (a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2012-10-19 08:47:21')
AND (a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2012-10-19 08:47:21')
GROUP BY a.id, a.title, a.alias, a.title_alias, a.introtext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias, a.created, a.modified, a.modified_by, uam.name, a.publish_up, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, a.fulltext, a.state, a.publish_down, badcats.id, c.title, c.path, c.access, c.alias, uam.id, ua.name, ua.email, contact.id, parent.title, parent.id, parent.path, parent.alias, v.rating_sum, v.rating_count, c.published, c.lft, a.ordering, parent.lft, fp.ordering, c.id, a.images, a.urls
ORDER BY c.lft, fp.ordering, a.created DESC
LIMIT 0, 4 - SELECT a.id, a.title, a.alias, a.title_alias, a.introtext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias,
CASE WHEN a.modified = 0 THEN a.created ELSE a.modified END as modified, a.modified_by, uam.name as modified_by_name,
CASE WHEN a.publish_up = 0 THEN a.created ELSE a.publish_up END as publish_up,a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, LENGTH(a.fulltext) AS readmore,
CASE WHEN badcats.id is not null THEN 0 ELSE a.state END AS state,c.title AS category_title, c.path AS category_route, c.access AS category_access, c.alias AS category_alias,
CASE WHEN a.created_by_alias > ' ' THEN a.created_by_alias ELSE ua.name END AS author,ua.email AS author_email,contact.id as contactid,parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating, v.rating_count as rating_count,c.published,
CASE WHEN badcats.id is null THEN c.published ELSE 0 END AS parents_published
FROM d14w2_content AS a
LEFT JOIN d14w2_categories AS c
ON c.id = a.catid
LEFT JOIN d14w2_users AS ua
ON ua.id = a.created_by
LEFT JOIN d14w2_users AS uam
ON uam.id = a.modified_by
LEFT JOIN ( SELECT contact.user_id, MAX(contact.id) AS id, contact.language
FROM d14w2_contact_details AS contact
WHERE contact.published = 1
GROUP BY contact.user_id, contact.language) AS contact
ON contact.user_id = a.created_by
LEFT JOIN d14w2_categories as parent
ON parent.id = c.parent_id
LEFT JOIN d14w2_content_rating AS v
ON a.id = v.content_id
LEFT
OUTER JOIN (SELECT cat.id as id
FROM d14w2_categories AS cat JOIN d14w2_categories AS parent
ON cat.lft BETWEEN parent.lft
AND parent.rgt
WHERE parent.extension = 'com_content'
AND parent.published != 1
GROUP BY cat.id ) AS badcats
ON badcats.id = c.id
INNER JOIN d14w2_content_frontpage AS fp
ON fp.content_id = a.id
WHERE a.access IN (1,1)
AND c.access IN (1,1)
AND
CASE WHEN badcats.id is null THEN a.state ELSE 0 END = 1
AND (a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2012-10-19 08:47:21')
AND (a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2012-10-19 08:47:21')
GROUP BY a.id, a.title, a.alias, a.title_alias, a.introtext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias, a.created, a.modified, a.modified_by, uam.name, a.publish_up, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, a.fulltext, a.state, a.publish_down, badcats.id, c.title, c.path, c.access, c.alias, uam.id, ua.name, ua.email, contact.id, parent.title, parent.id, parent.path, parent.alias, v.rating_sum, v.rating_count, c.published, c.lft, a.ordering, parent.lft, fp.ordering, c.id, a.images, a.urls
ORDER BY c.lft, fp.ordering, a.created DESC
