0
我們爲我們管理客戶端的網站，這個網站正在處理嚴重的性能問題。這個網站建立在一個CMS內，並且同時處理最多20個訪問者。只要該網站的訪問者是該網站的唯一用戶，一切都會好起來。 CMS構建緩存並將mysql查詢的使用保持在最低限度。性能問題mysql數據庫
當我們的客戶的員工自己開始在網站上工作時，表現開始缺乏。整個工作流程通過站點，包括更新數據庫中的記錄並插入新的記錄。當記錄得到更新時，被刪除或插入的緩存被刪除，因此網站訪問者的行爲將被引用到查詢中。
我的第一個問題是mysql應該能夠處理這些請求嗎？ 即使數據庫的設計不好（見下文）。 當我看到mysql中的進程列表時，我看到簡單的查詢需要15秒。 當更新或插入查詢同時進行時，這些查詢似乎只需要很長時間。
下面是保存所有記錄的大表。 網站前端使用的一切都存儲在這個表中。包括binarys在內的 。該表共有8,676條記錄。 前端有很多查詢使用WHERE，例如Variabele5或Variabele6 這些Variabele字段的值取決於contenttype。
的WHERE是例如：
WHERE Variabele5 > 500 AND Variabele6 =2 AND contenttype = 35
，所有的員工在沒有得到緩存的工作環境。 在此環境中，有幾個列表，包括訂單和搜索選項。 這些查詢儘可能memcached，但是當記錄更新，刪除或插入時，memcache被清除。這與插入，更新和刪除操作相結合可能是瓶頸。
所以我的問題是應該mysql能夠處理這一切或是數據庫的設計不善處理請求。
+---------------+---------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +---------------+---------------+------+-----+---------+----------------+ | nr | mediumint(80) | NO | PRI | NULL | auto_increment | | hidden | int(1) | NO | | 0 | | | Title | varchar(255) | NO | MUL | | | | Body | text | NO | | NULL | | | Description | text | NO | | NULL | | | user_id | mediumint(80) | NO | | 0 | | | addate | varchar(255) | NO | | NULL | | | moddate | varchar(255) | NO | | NULL | | | contenttype | mediumint(80) | NO | MUL | 0 | | | parent | mediumint(80) | NO | | 0 | | | Status | mediumint(80) | NO | MUL | NULL | | | CODE | varchar(255) | NO | MUL | NULL | | | menu | mediumint(80) | NO | | NULL | | | filetype | mediumint(80) | NO | | NULL | | | folder | int(11) | NO | | NULL | | | sortIndex | bigint(255) | NO | | NULL | | | servercache | int(1) | NO | | 1 | | | futurecache | int(1) | NO | | NULL | | | publishFrom | date | YES | | NULL | | | publishUntil | date | YES | | NULL | | | pinned | int(11) | YES | | NULL | | | keywords | text | NO | | NULL | | | latestversion | int(11) | NO | | NULL | | | permalink | text | NO | | NULL | | | Integer1 | int(12) | NO | | 0 | | | Integer2 | int(4) | NO | | 0 | | | Integer3 | int(4) | NO | | 0 | | | Integer4 | int(4) | NO | | 0 | | | Variabele1 | varchar(255) | NO | | | | | Variabele2 | varchar(255) | NO | | | | | Variabele3 | varchar(255) | NO | | | | | Variabele4 | varchar(255) | NO | | | | | Date1 | varchar(255) | NO | | | | | Date2 | varchar(255) | NO | | | | | Text1 | text | NO | | NULL | | | Text2 | text | NO | | NULL | | | Text3 | text | NO | | NULL | | | Binary1 | longblob | NO | | NULL | | | Binary1Type | varchar(255) | NO | | NULL | | | Binary2 | longblob | NO | | NULL | | | Binary2Type | varchar(255) | NO | | NULL | | | Binary3 | longblob | NO | | NULL | | | Binary3Type | varchar(255) | NO | | NULL | | | browseAccess | varchar(255) | NO | | NULL | | | Binary4 | longblob | NO | | NULL | | | Binary4Type | varchar(255) | NO | | NULL | | | Binary5 | longblob | NO | | NULL | | | Binary5Type | varchar(255) | NO | | NULL | | | Binary6 | longblob | NO | | NULL | | | Binary6Type | varchar(255) | NO | | NULL | | | Integer5 | int(11) | NO | | NULL | | | Integer6 | int(11) | NO | | NULL | | | Variabele6 | varchar(255) | NO | | NULL | | | Binary7 | longblob | NO | | NULL | | | Binary7Type | varchar(255) | NO | | NULL | | | Binary8 | longblob | NO | | NULL | | | Binary8Type | varchar(255) | NO | | NULL | | | Binary9 | longblob | NO | | NULL | | | Binary9Type | varchar(255) | NO | | NULL | | | Binary10 | longblob | NO | | NULL | | | Binary10Type | varchar(255) | NO | | NULL | | | Binary11 | longblob | NO | | NULL | | | Binary11Type | varchar(255) | NO | | NULL | | | Binary12 | longblob | NO | | NULL | | | Binary12Type | varchar(255) | NO | | NULL | | | Binary13 | longblob | NO | | NULL | | | Binary13Type | varchar(255) | NO | | NULL | | | Binary14 | longblob | NO | | NULL | | | Binary14Type | varchar(255) | NO | | NULL | | | Binary15 | longblob | NO | | NULL | | | Binary15Type | varchar(255) | NO | | NULL | | | Text4 | text | NO | | NULL | | | Text5 | text | NO | | NULL | | | Text6 | text | NO | | NULL | | | Text7 | text | NO | | NULL | | | Text8 | text | NO | | NULL | | | Variabele5 | varchar(255) | NO | | NULL | | | Variabele7 | varchar(255) | NO | | NULL | | | Variabele8 | varchar(255) | NO | | NULL | | | Variabele9 | varchar(255) | NO | | NULL | | | Variabele10 | text | NO | | NULL | | | Variabele11 | varchar(255) | NO | | NULL | | | Variabele12 | varchar(255) | NO | | NULL | | | Variabele13 | varchar(255) | NO | | NULL | | | Variabele14 | varchar(255) | NO | | NULL | | | Variabele15 | varchar(255) | NO | | NULL | | | Variabele16 | varchar(255) | NO | | NULL | | | Variabele17 | varchar(255) | NO | | NULL | | | Variabele18 | varchar(255) | NO | | NULL | | | Variabele19 | varchar(255) | NO | | NULL | | | Variabele20 | varchar(255) | NO | | NULL | | | Variabele21 | varchar(255) | NO | | NULL | | | Variabele22 | varchar(255) | NO | | NULL | | | Variabele23 | varchar(255) | NO | | NULL | | | Variabele24 | varchar(255) | NO | | NULL | | | Variabele25 | varchar(255) | NO | | NULL | | | Variabele26 | varchar(255) | NO | | NULL | | | Variabele27 | varchar(255) | NO | | NULL | | | Variabele28 | varchar(255) | NO | | NULL | | | Variabele29 | varchar(255) | NO | | NULL | | | Variabele30 | varchar(255) | NO | | NULL | | | Variabele31 | varchar(255) | NO | | NULL | | | Variabele32 | varchar(255) | NO | | NULL | | | Variabele33 | varchar(255) | NO | | NULL | | | Variabele34 | varchar(255) | NO | | NULL | | | Variabele35 | varchar(255) | NO | | NULL | | | Variabele36 | varchar(255) | NO | | NULL | | | Variabele37 | varchar(255) | NO | | NULL | | | Variabele38 | varchar(255) | NO | | NULL | | | Variabele39 | varchar(255) | NO | | NULL | | | Variabele40 | varchar(255) | NO | | NULL | | | Variabele41 | varchar(255) | NO | | NULL | | | Variabele42 | varchar(255) | NO | | NULL | | | Variabele43 | varchar(255) | NO | | NULL | | | Variabele44 | varchar(255) | NO | | NULL | | | Variabele45 | varchar(255) | NO | | NULL | | | Variabele46 | varchar(255) | NO | | NULL | | | Variabele47 | varchar(255) | NO | | NULL | | | Variabele48 | varchar(255) | NO | | NULL | | | Variabele49 | varchar(255) | NO | | NULL | | | Variabele50 | varchar(255) | NO | | NULL | | +---------------+---------------+------+-----+---------+----------------+
指標：
+-------------+--------------+--------------+-------------+------+ | Key_name | Seq_in_index | Column_name | Cardinality | Null | +-------------+--------------+--------------+-------------+------+ | PRIMARY | 1 | nr | 8675 | | | Status | 1 | Status | 5 | | | Status | 2 | publishFrom | 8675 | YES | | Status | 3 | publishUntil | 8675 | YES | | CODE | 1 | CODE | 4337 | | | CODE | 2 | Title | 4337 | | | contenttype | 1 | contenttype | 30 | | | Title | 1 | Title | 2891 | | +-------------+--------------+--------------+-------------+------+
服務器信息： 4X英特爾（R）至強（R）CPU L5630 @ 2.13GHz的
+---------------------------------------------------------------------------+ | free -mt | +---------------------------------------------------------------------------+ | total used free shared buffers cached | | Mem: 4096 3841 254 0 44 1223 | | -/+ buffers/cache: 2573 1522 | | Swap: 1023 422 601 | | Total: 5119 4263 856 | +---------------------------------------------------------------------------+
如果我需要提供什麼信息，請讓我知道。
編輯：一些示例querys
的querys有所不同，但這裏有一些例子：
爲僱員搜索查詢：
EXPLAIN SELECT profiel.nr as nr, CONCAT(profiel.title,' ',profiel.Variabele49) as naam,profiel.Variabele3 as tel, profiel.Variabele44 as huurprijs, profiel.Variabele5 as inkomen, profiel.Variabele39 as personen, profiel.Variabele46 as perdatum, profiel.addate as inschrijving, profiel.text1 as opmerkingen, medewerker.Title as m_naam,profiel.Variabele48 as lang FROM site_content as profiel left join vw_activeContent as medewerker on medewerker.nr = profiel.Variabele9 WHERE profiel.contenttype =26 AND (profiel.Status=3 OR profiel.Text8='Nee') AND ( profiel.nr LIKE '%Rem%' OR profiel.title LIKE '%Rem%' OR ' ' LIKE '%Rem%' OR CONCAT(profiel.title,' ',profiel.Variabele49) LIKE '%Rem%' OR profiel.Variabele49 LIKE '%Rem%' OR profiel.Variabele3 LIKE '%Rem%' OR profiel.Variabele44 LIKE '%Rem%' OR profiel.Variabele5 LIKE '%Rem%' OR profiel.Variabele39 LIKE '%Rem%' OR profiel.Variabele46 LIKE '%Rem%' OR profiel.addate LIKE '%Rem%' OR profiel.text1 LIKE '%Rem%' OR medewerker.Title LIKE '%Rem%' OR profiel.Variabele48 LIKE '%Rem%' OR profiel.Variabele1 LIKE '%Rem%' OR profiel.Variabele3 LIKE '%Rem%') ORDER BY profiel.sortIndex
+----+-------------+-------+--------------+--------+----------------+--------------------+-------------+---+---------+--------------------+---+-------------+-----------------------------+-------+ | id | select_type | table | | type | possible_keys | | key | | key_len | ref | | | rows | Extra | +----+-------------+-------+--------------+--------+----------------+--------------------+-------------+---+---------+--------------------+---+-------------+-----------------------------+-------+ | 1 | SIMPLE | | profiel | | ref | Status,contenttype | contenttype | 3 | const | | | 1700 | Using where; Using filesort | | | 1 | SIMPLE | | site_content | eq_ref | PRIMARY,Status | | PRIMARY | | 3 | profiel.Variabele9 | 1 | Using where | | | +----+-------------+-------+--------------+--------+----------------+--------------------+-------------+---+---------+--------------------+---+-------------+-----------------------------+-------+
搜索查詢訪客
EXPLAIN SELECT nr, title AS adres, Description AS description, Binary3 AS bin, Variabele2 AS
TYPE , Text3, Text2 AS verhuurd, Integer2 AS kamers, Integer3 AS personen, Variabele4 AS inclusief, Text1 AS oplevering, Integer5 AS huurpijs, Variabele6 AS wijk, moddate
FROM vw_activeContent
WHERE contenttype =22
AND Integer2 >=2
AND Integer3 >=1
AND Integer5 >380
AND Integer5 <770
ORDER BY Integer5 ASC
+----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+-----------------------------+------+-------+ | id | select_type | table | | type | possible_keys | | key | | key_len | ref | rows | Extra | +----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+-----------------------------+------+-------+ | 1 | SIMPLE | | site_content | ref | Status,contenttype | contenttype | 3 | const | 696 | Using where; Using filesort | | | +----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+-----------------------------+------+-------+
查詢，廣泛用於：
EXPLAIN SELECT DISTINCT Variabele2
FROM site_content
WHERE contenttype =22
AND STATUS =1
ORDER BY Variabele2 ASC
+----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+----------------------------------------------+------+-------+ | id | select_type | table | | type | possible_keys | | key | | key_len | ref | rows | Extra | +----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+----------------------------------------------+------+-------+ | 1 | SIMPLE | | site_content | ref | Status,contenttype | contenttype | 3 | const | 696 | Using where; Using temporary; Using filesort | | | +----+-------------+-------+--------------+------+--------------------+-------------+-----+-------+---------+----------------------------------------------+------+-------+
如何發佈您的查詢，在其上發佈EXPLAIN以顯示MySQL如何執行它們？ – hd1
也請向我們展示SQL語句。 –
添加了一些查詢示例 – Jeroen