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【转】查询oracle比较慢的session和sql
-查询最慢的sql select * from ( select parsing_user_id,executions,sorts command_type,disk_reads,sql_text from v$sqlarea order by disk_reads desc )where rown ...
分类:数据库   时间:2016-09-06 19:57:04    阅读次数:214
LeetCode-Read N Characters Given Read4 II - Call multiple times
The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual number of characters read. For example, it retu ...
分类:其他好文   时间:2016-08-30 07:05:28    阅读次数:146
Largest palindrome product
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99. Find the largest ...
分类:其他好文   时间:2016-08-22 18:16:49    阅读次数:165
生物信息 perl 脚本实战
索引 1.统计fasta、fa和fastq文件的长度,统计fastq的reads个数,单个reads长度,reads总长度;统计fasta文件中contig的个数,列出名称,单条的长度,以及总长度。 1.统计fasta、fa和fastq文件的长度,统计fastq的reads个数,单个reads长度,... ...
分类:其他好文   时间:2016-08-11 17:49:24    阅读次数:1537
Oracle优化 -- 关于Database Buffer Cache相关参数DB_CACHE_SIZE的优化设置
select size_for_estimate, buffers_for_estimate ,ESTD_PHYSICAL_READ_factor,ESTD_PHYSICAL_READS from v$db_cache_advice 2 where block_size='8192' and adv ...
分类:数据库   时间:2016-08-09 13:23:34    阅读次数:633
事务和隔离级别
脏读 dirty reads:当事务读取还未被提交的数据时,就会发生这种事件。举例来说:Transaction 1修改了一行数据,然后Transaction 2在Transaction 1还未提交修改操作之前读取了被修改的行。如果Transaction 1回滚了修改操作,那么Transaction ...
分类:其他好文   时间:2016-08-07 13:49:10    阅读次数:137
POJ1201 Intervals
Description You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a program that: reads the number of intervals, their ...
分类:其他好文   时间:2016-08-05 21:25:36    阅读次数:281
properties.load(in); 引出的中文乱码问题
/** * Reads a property list (key and element pairs) from the input byte stream. * The input stream is in a simple line-oriented format and is assumed ...
分类:其他好文   时间:2016-08-05 19:37:32    阅读次数:169
Falcon:三代reads比对组装工具箱
主页:github: PacificBiosciences/FALCON 简介 Falcon是一组通过快速比对长reads,从而来consensus和组装的工具。 Falcon工具包是一组简单的代码集合,我使用它们来研究单倍体和二倍体基因组的高效组装算法。 为了提高计算速度,它有一些后台代码是使用C... ...
分类:其他好文   时间:2016-08-01 10:37:13    阅读次数:1154
Falcon Genome Assembly Tool Kit Manual
Falcon Falcon: a set of tools for fast aligning long reads for consensus and assembly The Falcon tool kit is a set of simple code collection which I u... ...
分类:其他好文   时间:2016-08-01 10:36:05    阅读次数:505
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