我打开了Drupal站点的慢速查询，下面是十大慢速查询。我能找到他们的来源吗
Reading mysql slow query log from /var/log/mysql/mysql-slow.log
Count: 1 Time=220.72s (220s) Lock=0.00s (0s) Rows=14293563.0 (14293563), root[root]@localhost
SELECT /*!N SQL_NO_CACHE */ * FROM `sessions`
Count: 1 Time=42.62s (42s) Lock=0.00s (0s) Rows=4181557.0 (4181557), root[root]@localhost
SELECT /*!N SQL_NO_CACHE */ * FROM `search_index`
Count: 1 Time=28.26s (28s) Lock=0.00s (0s) Rows=1.0 (1), exdigital[exdigital]@[10.200.1.1]
SELECT * FROM term_data WHERE tid IN (N)
Count: 1 Time=27.87s (27s) Lock=0.00s (0s) Rows=7.0 (7), exdigital[exdigital]@[10.200.1.1]
SELECT * FROM nodewords WHERE type = N AND id = N
Count: 6 Time=19.98s (119s) Lock=0.08s (0s) Rows=1.0 (6), exdigital[exdigital]@[10.200.1.1]
SELECT COUNT(*) FROM (SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN term_node term_node_value_12 ON node.vid = term_node_value_12.vid AND term_node_value_12.tid = N
LEFT JOIN term_node term_node_value_13 ON node.vid = term_node_value_13.vid AND term_node_value_13.tid = N
LEFT JOIN term_node term_node_value_14 ON node.vid = term_node_value_14.vid AND term_node_value_14.tid = N
LEFT JOIN term_node term_node_value_15 ON node.vid = term_node_value_15.vid AND term_node_value_15.tid = N
LEFT JOIN term_node term_node_value_16 ON node.vid = term_node_value_16.vid AND term_node_value_16.tid = N
LEFT JOIN term_node term_node_value_17 ON node.vid = term_node_value_17.vid AND term_node_value_17.tid = N
LEFT JOIN term_node term_node_value_18 ON node.vid = term_node_value_18.vid AND term_node_value_18.tid = N
LEFT JOIN term_node term_node_value_19 ON node.vid = term_node_value_19.vid AND term_node_value_19.tid = N
LEFT JOIN term_node term_node_value_20 ON node.vid = term_node_value_20.vid AND term_node_value_20.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N OR term_node_value_12.tid = N OR term_node_value_13.tid = N OR term_node_value_14.tid = N OR term_node_value_15.tid = N OR term_node_value_16.tid = N OR term_node_value_17.tid = N OR term_node_value_18.tid = N OR term_node_value_19.tid = N OR term_node_value_20.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N) count_alias
Count: 13 Time=19.47s (253s) Lock=0.03s (0s) Rows=1.0 (13), exdigital[exdigital]@[10.200.1.1]
SELECT COUNT(*) FROM (SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN term_node term_node_value_12 ON node.vid = term_node_value_12.vid AND term_node_value_12.tid = N
LEFT JOIN term_node term_node_value_13 ON node.vid = term_node_value_13.vid AND term_node_value_13.tid = N
LEFT JOIN term_node term_node_value_14 ON node.vid = term_node_value_14.vid AND term_node_value_14.tid = N
LEFT JOIN term_node term_node_value_15 ON node.vid = term_node_value_15.vid AND term_node_value_15.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N OR term_node_value_12.tid = N OR term_node_value_13.tid = N OR term_node_value_14.tid = N OR term_node_value_15.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N) count_alias
Count: 5 Time=17.67s (88s) Lock=0.00s (0s) Rows=3.0 (15), exdigital[exdigital]@[10.200.1.1]
SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN term_node term_node_value_12 ON node.vid = term_node_value_12.vid AND term_node_value_12.tid = N
LEFT JOIN term_node term_node_value_13 ON node.vid = term_node_value_13.vid AND term_node_value_13.tid = N
LEFT JOIN term_node term_node_value_14 ON node.vid = term_node_value_14.vid AND term_node_value_14.tid = N
LEFT JOIN term_node term_node_value_15 ON node.vid = term_node_value_15.vid AND term_node_value_15.tid = N
LEFT JOIN term_node term_node_value_16 ON node.vid = term_node_value_16.vid AND term_node_value_16.tid = N
LEFT JOIN term_node term_node_value_17 ON node.vid = term_node_value_17.vid AND term_node_value_17.tid = N
LEFT JOIN term_node term_node_value_18 ON node.vid = term_node_value_18.vid AND term_node_value_18.tid = N
LEFT JOIN term_node term_node_value_19 ON node.vid = term_node_value_19.vid AND term_node_value_19.tid = N
LEFT JOIN term_node term_node_value_20 ON node.vid = term_node_value_20.vid AND term_node_value_20.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N OR term_node_value_12.tid = N OR term_node_value_13.tid = N OR term_node_value_14.tid = N OR term_node_value_15.tid = N OR term_node_value_16.tid = N OR term_node_value_17.tid = N OR term_node_value_18.tid = N OR term_node_value_19.tid = N OR term_node_value_20.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N, N
Count: 24 Time=13.51s (324s) Lock=0.00s (0s) Rows=2.9 (70), exdigital[exdigital]@[10.200.1.1]
SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N, N
Count: 12 Time=11.31s (135s) Lock=0.71s (8s) Rows=1.0 (12), exdigital[exdigital]@[10.200.1.1]
SELECT COUNT(*) FROM (SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN term_node term_node_value_12 ON node.vid = term_node_value_12.vid AND term_node_value_12.tid = N
LEFT JOIN term_node term_node_value_13 ON node.vid = term_node_value_13.vid AND term_node_value_13.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N OR term_node_value_12.tid = N OR term_node_value_13.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N) count_alias
Count: 23 Time=10.95s (251s) Lock=0.40s (9s) Rows=1.0 (23), exdigital[exdigital]@[10.200.1.1]
SELECT COUNT(*) FROM (SELECT DISTINCT(node.nid) AS nid,
node.vid AS node_vid,
node.title AS node_title,
node.created AS node_created
FROM node node
LEFT JOIN term_node term_node ON node.vid = term_node.vid
LEFT JOIN term_data term_data ON term_node.tid = term_data.tid
LEFT JOIN term_node term_node_value_0 ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
LEFT JOIN term_node term_node_value_1 ON node.vid = term_node_value_1.vid AND term_node_value_1.tid = N
LEFT JOIN term_node term_node_value_2 ON node.vid = term_node_value_2.vid AND term_node_value_2.tid = N
LEFT JOIN term_node term_node_value_3 ON node.vid = term_node_value_3.vid AND term_node_value_3.tid = N
LEFT JOIN term_node term_node_value_4 ON node.vid = term_node_value_4.vid AND term_node_value_4.tid = N
LEFT JOIN term_node term_node_value_5 ON node.vid = term_node_value_5.vid AND term_node_value_5.tid = N
LEFT JOIN term_node term_node_value_6 ON node.vid = term_node_value_6.vid AND term_node_value_6.tid = N
LEFT JOIN term_node term_node_value_7 ON node.vid = term_node_value_7.vid AND term_node_value_7.tid = N
LEFT JOIN term_node term_node_value_8 ON node.vid = term_node_value_8.vid AND term_node_value_8.tid = N
LEFT JOIN term_node term_node_value_9 ON node.vid = term_node_value_9.vid AND term_node_value_9.tid = N
LEFT JOIN term_node term_node_value_10 ON node.vid = term_node_value_10.vid AND term_node_value_10.tid = N
LEFT JOIN term_node term_node_value_11 ON node.vid = term_node_value_11.vid AND term_node_value_11.tid = N
LEFT JOIN term_node term_node_value_12 ON node.vid = term_node_value_12.vid AND term_node_value_12.tid = N
LEFT JOIN domain_access domain_access ON node.nid = domain_access.nid
INNER JOIN node_access na ON na.nid = node.nid LEFT JOIN node n ON node.nid = n.nid WHERE (na.grant_view >= N AND ((na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S') OR (na.gid = N AND na.realm = 'S'))) AND ((n.moderate != N)) AND ( (node.moderate = N) AND (node.status <> N) AND (term_data.vid in ('S', 'S', 'S', 'S', 'S')) AND (node.nid != N) AND (term_node_value_0.tid = N OR term_node_value_1.tid = N OR term_node_value_2.tid = N OR term_node_value_3.tid = N OR term_node_value_4.tid = N OR term_node_value_5.tid = N OR term_node_value_6.tid = N OR term_node_value_7.tid = N OR term_node_value_8.tid = N OR term_node_value_9.tid = N OR term_node_value_10.tid = N OR term_node_value_11.tid = N OR term_node_value_12.tid = N) AND (domain_access.gid = 'S')
)GROUP BY nid
ORDER BY node_created DESC
LIMIT N) count_alias
如果您建议使用一些工具，可以将查询回溯到所使用的视图或模块，这将是有益的；如果存在这种情况，则提供。如果你的问题引起共鸣，请写一个评论。
非常感谢。。
最佳答案
我不会太担心那些只发生一次的事情。大多数只是SELECT * FROM big_table这很可能是通过一些管理员完成的。我不确定什么可以获取整个会话表，它没有多大用处。
无论如何，其他多次出现的查询很可能是由视图生成的：
LEFT JOIN term_node term_node_value_0
ON node.vid = term_node_value_0.vid AND term_node_value_0.tid = N
执行其中的20个连接将减慢任何查询的速度，这也是它看起来像视图的原因。视图在不知道您真正想做什么的情况下进行泛型查询。所以它可以做出任何假设，这就是为什么它在某些情况下会做出这样疯狂的查询。唯一的解决方法是自定义视图代码，或者只编写查询代码。当事情有点复杂时，视图很难对术语进行良好的查询，因为术语有一对多的关系（可以将一个术语关联到生成节点）。
因此，检查您拥有哪些视图，您可能可以从视图UI中使用缓存来处理这个问题。
关于drupal - Drupal慢查询日志分析，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/3854056/