reads

Oracle 常用性能监控SQL语句

nbsp; --查看表锁     SELECT * FROM SYS.V_$SQLAREA WHERE DISK_READS
panhongbin100·2012-07-20 11:00

通过v$sqlarea和v$sql视图查找比较耗费资源的sql

1.从v$sqlarea中找出最多的物理读的sql select b.username,         a.DISK_READS,         a.EXECUTIONS, 
suredandan·2012-07-17 11:39

事物隔离机制

两个事务更新一行数据，但是第二事务却中途失败退出，导致对数据两个修改都失效了，这是 [/size][size=x-large]系统没有执行任何锁操作，因此并发事务并没有被隔离开来 2.脏读取（Dirty Reads
humn_chou·2012-07-14 12:00

memcached telnet

    Command Description Example get Reads a value get mykey set Set a key unconditionally
san_yun·2012-07-13 16:00

sql里

从V$SQLAREA中查询最占用资源的查询 select b.username username,a.disk_reads reads,     a.executions
ssydxa219·2012-06-28 10:00

sed系列:文件多行操作

Sed reads line by line, removes any trailing new lines, places a line in a pattern space buffer, process
ilnba·2012-06-26 12:00

Oracle 11g 中 Direct path reads 特性 说明

 一.DirectPathReads说明在oracle11g以前的版本中，如果对大表进行全表扫描，waitevent是：dbfilescatteredread；在11g中，如果对大表进行全表扫描，waitevent是：directpathread；即在11g中，大表全表扫描是将数据块直接读入会话的pga区域。（具体的查看方法参考后面的示例）。           在11g中，大表全表扫描时数据块不
tianlesoftware·2012-06-25 16:00

死锁分析以及解决

Jul 2 21:33:13 2010 Interval: 2 Cswitch 1473 Readch 0.0G Syscall 1452 Writech 0.0G Kernel 3.6 |## | Reads
my_java_life·2012-06-02 20:00

SQL Server IO 子系统浅究 II

在SQLServer上，涉及I/O的计数器有：Averagereadbytes/sec,平均每秒的读取字节数Averagewritebytes/sec，平均每秒的写入字节数Reads/sec,每秒多少读
weizhiai12·2012-05-31 16:00

两列样本差异基因筛选

_63329a920100o6yd.html两列样本数据的差异基因筛选方法：FoldChange法+FDR控制其中，FDR值的计算方法如下：1）对每个基因进行p-value的计算假设观测到基因A对应的reads
likelet·2012-05-29 14:00

perl读写文件

perlmy$SRC_FILE="/home/lgg/t.txt";my$DEST_FILE="/home/lgg/dest.txt";if(open(SRCFILE,"$DEST_FILE");my@reads
luogen33·2012-05-23 10:00

Oracle 常用性能监控SQL语句

--查看表锁 SELECT * FROM SYS.V_$SQLAREA WHERE DISK_READS > 100; 2.
weishaoxiang·2012-05-16 14:00

Oracle 常用性能监控SQL语句

--查看表锁 SELECT * FROM SYS.V_$SQLAREA WHERE DISK_READS > 100; 2.
weishaoxiang·2012-05-16 14:00

Oracle性能调优常用语句

--识别'低效执行'的SQL语句： SELECT  EXECUTIONS , DISK_READS, BUFFER_GETS,  ROUND((BUFFER_GETS-DISK_READS
chenjc_it·2012-05-10 20:00

Oracle性能调优常用语句

--识别'低效执行'的SQL语句： SELECT  EXECUTIONS , DISK_READS, BUFFER_GETS,  ROUND((BUFFER_GETS-DISK_READS
chenjc_it·2012-05-10 20:00

Java Lock 实例 -- 实现简单的tee

Java) that implements the Unix tee command, which is invoked as follows: tee filename The command reads
fanrey·2012-05-08 21:00

重要章节1：makefile如何读取的

3.7 How make Reads a Makefile GNU make does its work in two distinct phases.
daojin·2012-05-06 21:00

合并报表优化记录

*FROMT_CSL_CslReportWHEREFSourceRptID='4583062d-010a-1000-e002-63bbc0a8ef02B712EA2C')未优化前:执行成本:0.396Reads
fyq891014·2012-05-05 18:00

oracle TOPSQL整理

--top10sql SELECT* FROM(SELECTb.usernameusername, a.disk_reads /DECODE(a.executions,0,1,a.executions
·2012-05-05 07:00

This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA

ThisfunctionhasnoneofDETERMINISTIC,NOSQL,orREADSSQLDATAinitsdeclarationandbinarymysql的设置默认是不允许创建函数解决办法1:执行：SETGLOBALlog_bin_trust_function_creators=1;不过重启了就失效了注意：有主从复制的时候从机必须要设置 不然会导致主从同步失败解决办法2：在my.c
lxpbs8851·2012-05-04 17:00

SQL分析Profiler生成的TRC文件

通过Select查询 过滤trc文件，显示a.CPU,a.Reads,a.Writes,a.Duration,a.TextData等文件内容，代码如下：SELECTtop100a.CPU,a.Reads
snowfoxmonitor·2012-05-04 09:00

欧拉计划第4题

Problem 4:       A palindromic number reads the same both ways. 
ll_0520·2012-04-30 19:00

错误码: 1418 This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and

创建存储函数的时候，会遇到这样的错误：SQL：DELIMITER;;CREATEFUNCTION`GetGuid`()RETURNSVARCHAR(40)CHARSETutf8COMMENT'获取不带"-"的GUID'BEGINDECLAREidVARCHAR(40);SETid=(SELECTREPLACE(UUID(),'-',''));RETURNid;END;;DELIMITER;错误码:
qiuyepiaoling·2012-04-24 14:06

ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS

ERROR1418(HY000):ThisfunctionhasnoneofDETERMINISTIC,NOSQL,orREADSSQLDATAinitsdeclarationandbinaryloggingisenabled(you*might*wanttousethelesssafelog_bin_trust_function_creatorsvariable 如果我们开启了bin-log,我
yangzhimingg·2012-04-22 08:50

生物信息_Call_snp_by_soapsnp_全基因组

Get_uniq_map_reads（0.5G）:从
BBka_717·2012-04-20 15:16

Oracle 检查命中率的SQL

nbsp; 缓冲区命中率: 缓冲区命中率表示在不需要进行磁盘访问的情况下在内存结构中找到常用数据块的频率   select (1-(sum(decode(name, 'physical reads
dengyll·2012-04-16 21:00

hadoop 0.23 编译

hadoopdevelopmentenvironmenttobuild7 peopleBookmarkthisarticle 我要收藏 5monthsago 523 reads 1 commentshadoopdevelopmentenvironmentsetup
zhaokunwu·2012-04-12 16:00

创建function时出错

创建function时 出错信息： ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS
jinyanhui2008·2012-04-06 17:00

创建function时出错

创建function时 出错信息： ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS
jinyanhui2008·2012-04-06 17:00

《Pro Oracle SQL》Chapter 3 -- 3.3.3 Hash Joins

nbsp;     (page 116)      Hash joins, like sort-merge joins, first reads
caohong286·2012-03-30 02:00

Spring事务隔离级别和传播行为

先说下数据读取的几个异常情况： 1.读取脏数据（Dirty reads）。就是读取到了其他事务没有提交的数据。比如2个并发的事务A,B。
ganqing1234·2012-03-29 19:00

【zk开发】zk注解的秘密

The DataBinder that reads ZUML annotations to create binding info.
snoopy7713·2012-02-24 14:00

【zk开发】zk注解的秘密

The DataBinder that reads ZUML annotations to create binding info.
snoopy7713·2012-02-24 14:00

This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in ...

ThisfunctionhasnoneofDETERMINISTIC,NOSQL,orREADSSQLDATAin...创建function时出错信息：ERROR1418(HY000):ThisfunctionhasnoneofDETERMINISTIC,NOSQL,orREADSSQLDATAinitsdeclarationandbinaryloggingisenabled(you*might*
我的java天地·2012-02-21 10:00

"DataXceiver: java.io.IOException: Connection reset by peer" erro

最近在跑mr任务的时候 ,查看datanode节点的log日志,总是会看到这个错误,仔细的查了下发现有人提过这个bug,如下： When a client reads data using read
黎明lm·2012-02-15 09:00

DB2 Procedure样例

下面是两个DB2 Procedure的例子： 例子1： CREATE PROCEDURE getPeople(IN piAge INTEGER)DYNAMIC RESULT SETS 2READS
maosheng·2012-02-13 15:00

几个并发的概念

我们首先说并发中可能发生的3中不讨人喜欢的事情： 1： Dirty reads--读脏数据。
小乙静流·2012-02-13 09:00

FAQS

1.How can I get the largest amount of physical reads by any query?
edwards0307·2012-02-09 15:00

Oracle TOP Sql

 --top10sql SELECT  *    FROM(SELECT  b.usernameusername,                     a.disk_reads                   
linkiang·2012-02-07 16:04

查看sqlserver 2008中性能低下的语句

语句编译时间'       ,last_execution_time N'上次执行时间'       ,total_physical_readsN'物理读取总次数'       ,total_logical_reads
yangzhawen·2012-02-07 14:00

查看sqlserver 2008中性能低下的语句

语句编译时间'       ,last_execution_time N'上次执行时间'       ,total_physical_readsN'物理读取总次数'       ,total_logical_reads
ocpyang·2012-02-07 14:00

查看sqlserver 2008中性能低下的语句

SELECTcreation_timeN'语句编译时间',last_execution_timeN'上次执行时间',total_physical_readsN'物理读取总次数',total_logical_reads
ocpyang·2012-02-07 14:00

MySQL数据库开启或关闭函数功能

出现如下错误信息： ERROR 1418 : This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration
yang8820·2012-01-30 13:00

Spring乱码相关

-- Reads request input using UTF-8 encoding --> <filter> <filter-name>characterEncodingFilter
未雨绸缪·2012-01-14 13:00

什么是“脏读”、“不可重复的读”以及“虚读”

//terje.blog.163.com/blog/static/11924371200952910206453/，仅用于自己学习，若转载请注明出处）   脏读dirty   reads
harveyzeng·2011-12-27 16:00

什么是“脏读”、“不可重复的读”以及“虚读”

//terje.blog.163.com/blog/static/11924371200952910206453/，仅用于自己学习，若转载请注明出处）   脏读dirty   reads
harveyzeng·2011-12-27 16:00

MySQL创建方法错误:This function has none of DETERMINISTIC, NO SQL

创建function时 出错信息： ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQL
xiaoboss·2011-12-22 16:00

v$sysstat

 1、查看Oracle数据库缓冲区命中率selecta.value+b.value"logical_reads",c.value"phys_reads",round(100*((a.value+b.value
zui019·2011-12-09 17:37

How to fetch the SQL scipts with worst performance

ExecutebelowSQLscipttofetchtheSQLsciptswithworstperformance SELECTDB_NAME(dbid)AS[DB_NAME],creation_time,last_execution_time,total_physical_reads
Burgess_Liu·2011-12-08 10:00

HTTPSURL(DEMO)

package com.reads; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.InputStreamReader
kangzhan20·2011-12-05 11:00
上一页 20 21 22 23 24 25 26 27 下一页
按字母分类： ABCDEFGHIJKLMNOPQRSTUVWXYZ其他