Note: I am not entirely sure where this query belongs to, so please, feel free to edit tags and subscribers as needed.
The following query is being killed by the query killer and hence never completing as it takes longer than 1 minute to execute - it takes 1 row in set (11 min 32.981 sec) for enwiki
This is the query on enwiki:
SELECT rev_id,rev_page,rev_timestamp,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,comment_rev_comment.comment_text AS `rev_comment_text`,comment_rev_comment.comment_data AS `rev_comment_data`,comment_rev_comment.comment_id AS `rev_comment_cid`,actor_rev_user.actor_user AS `rev_user`,actor_rev_user.actor_name AS `rev_user_text`,temp_rev_user.revactor_actor AS `rev_actor`,page_namespace,page_title,page_id,page_latest,page_is_redirect,page_len,slot_revision_id,slot_content_id,slot_origin,slot_role_id,content_size,content_sha1,content_address,content_model,page_restrictions,1 AS `_load_content` FROM `page` JOIN `revision` ON ((page_id = rev_page)) JOIN `revision_comment_temp` `temp_rev_comment` ON ((temp_rev_comment.revcomment_rev = rev_id)) JOIN `comment` `comment_rev_comment` ON ((comment_rev_comment.comment_id = temp_rev_comment.revcomment_comment_id)) JOIN `revision_actor_temp` `temp_rev_user` ON ((temp_rev_user.revactor_rev = rev_id)) JOIN `actor` `actor_rev_user` ON ((actor_rev_user.actor_id = temp_rev_user.revactor_actor)) JOIN `slots` ON ((slot_revision_id = rev_id)) JOIN `content` ON ((content_id = slot_content_id)) WHERE (page_namespace=0 AND page_title='Bitcoin') AND (rev_timestamp > '19700101000001') AND (rev_page>0 OR (rev_page=0 AND rev_id>0)) ORDER BY rev_timestamp ASC LIMIT 1 ;
And the EXPLAIN:
+------+-------------+---------------------+--------+----------------------------------------------------------------------+---------------+---------+-----------------------------------------------+-----------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +------+-------------+---------------------+--------+----------------------------------------------------------------------+---------------+---------+-----------------------------------------------+-----------+-------------+ | 1 | SIMPLE | page | const | PRIMARY,name_title | name_title | 261 | const,const | 1 | | | 1 | SIMPLE | revision | range | PRIMARY,rev_timestamp,page_timestamp,page_user_timestamp,rev_page_id | rev_timestamp | 16 | NULL | 400072257 | Using where | | 1 | SIMPLE | temp_rev_comment | ref | PRIMARY,revcomment_rev | PRIMARY | 4 | enwiki.revision.rev_id | 1 | Using index | | 1 | SIMPLE | comment_rev_comment | eq_ref | PRIMARY | PRIMARY | 8 | enwiki.temp_rev_comment.revcomment_comment_id | 1 | | | 1 | SIMPLE | temp_rev_user | ref | PRIMARY,revactor_rev,actor_timestamp | PRIMARY | 4 | enwiki.revision.rev_id | 1 | Using index | | 1 | SIMPLE | actor_rev_user | eq_ref | PRIMARY | PRIMARY | 8 | enwiki.temp_rev_user.revactor_actor | 1 | | | 1 | SIMPLE | slots | ref | PRIMARY,slot_revision_origin_role | PRIMARY | 8 | enwiki.revision.rev_id | 1 | Using where | | 1 | SIMPLE | content | eq_ref | PRIMARY | PRIMARY | 8 | enwiki.slots.slot_content_id | 1 | | +------+-------------+---------------------+--------+----------------------------------------------------------------------+---------------+---------+-----------------------------------------------+-----------+-------------+ 8 rows in set (0.002 sec)
The trace comes from Error 2006 from WikiExporter::dumpPages
Error 2006 from WikiExporter::dumpPages, {error} {sql1line} {db_server}
url /w/index.php?title=Special:Export
fname WikiExporter::dumpPages