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http://www.oracle.com/pls/db112/docindex?preference=All
本日志由 flyinweb 于 2011-10-09 22:48:00 发表到 数据库技术 中,目前已经被浏览 239 次,评论 0 次;
作者添加了以下标签: Oracle Database List of Books,Oracle;
This FAQ is an incomplete summary of my experiences with speed-optimizing an application that uses the SQLite library. It will be of most use to people who are already familiar with using SQLite. Feel free to send any questions and comments.
It is released under the terms of the SQLite license :)
** The author disclaims copyright to this material. ** In place of a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give.
本日志由 flyinweb 于 2011-09-28 11:07:11 发表到 数据库技术 中,目前已经被浏览 331 次,评论 0 次;
作者添加了以下标签: SQLite Optimization,SQLite,SQLite tuning;
首页只显示了部分日志内容,要查看日志的全部内容请阅读全文;
一、基本简介
SQLite 数据库引擎实现了主要的 SQL-92 标准,引擎本身只有一个文件,大小不到 300k ,但是并不作为一个独立的进程运行,而是动态或者静态的链接到其他应用程序中。它生成的数据库文件是一个普通的磁盘文件,可以放置在任何目录下。SQLite 本身是 C 语言开发的,开源也跨平台,并且被所有的主流编程语言支持。
Tokyo Cabinet 是日本人 平林幹雄 开发的一款 DBM 数据库,该数据库读写非常快,哈希模式写入100万条数据只需0.643秒,读取100万条数据只需0.773秒,是 Berkeley DB 等 DBM 的几倍。
Tokyo Tyrant 是由同一作者开发的 Tokyo Cabinet 数据库网络接口。它拥有Memcached兼容协议,也可以通过HTTP协议进行数据交换。
Tokyo Tyrant 加上 Tokyo Cabinet,构成了一款支持高并发的分布式持久存储系统,对任何原有Memcached客户端来讲,可以将Tokyo Tyrant看成是一个Memcached,但是,它的数据是可以持久存储的。这一点,跟新浪的Memcachedb性质一样。
本日志由 flyinweb 于 2011-09-27 16:53:12 发表到 数据库技术 中,目前已经被浏览 397 次,评论 0 次;
作者添加了以下标签: Tokyo Tyrant,TTServer;
首页只显示了部分日志内容,要查看日志的全部内容请阅读全文;
一、XtraDB存储引擎
XtraDB是由Percona开发的一款MySQL数据库的高性能存储引擎,其目的是用来代替InnoDB存储引擎,可用于需要更高性能的环境。XtraDB可以看作是InnoDB存储引擎的增强版本,它在InnoDB上进行了大量的修改和patched,它完全兼容InnoDB,且提供了很多InnoDB不具备的有用的功能。
例如:在多核CPU上面的性能和伸缩性要更好;对于内存的分配和使用也要更好;也解除了InnoDB的很多限制;提供了比InnoDB更多的配置和性能监控参数。
Percona自己对新引擎的描述:“Percona XtraDB includes all of InnoDB's robust, reliable ACID-compliant design and advanced MVCC architecture, and builds on that solid foundation with more features, more tunability, more metrics, and more scalability. In particular, it is designed to scale better on many cores, to use memory more efficiently, and to be more convenient and useful. The new features are especially designed to alleviate some of InnoDB's limitations.”
对于高负载的MySQL应用来说,如果不需要MySQL官方技术支持的话,完全可以使用XtraDB来代替InnoDB存储引擎。此外,Percona还提供了打了补丁的MySQL版本,这些补丁对MySQL很多方面进行了改进,性能提高,增加更多监控参数等等。据说JavaEye的数据库就是使用了Percona的版本。
当前XtraDB的最新版本是1.0.4-8(release-8)
问题:
配置ISM时出错:
[root@idsserver ~]# ism_op -label /usr/backup/ptape -pool ISMDiskData -volume ISMData.0001
nsrmm: Invalid pool name `ISMDiskData'.
[root@idsserver ~]# ism_op -label /usr/backup/ltape -pool ISMDiskLogs -volume ISMLogs.0001
nsrmm: Invalid pool name `ISMDiskLogs'.
Linux AS4U8,
InformixDynamic Server Version 9.40.UC1E1
虚拟机环境
解决:
重启了一下虚拟机,重头做起,正常了,不过仍然不知道问题出在哪里?
本日志由 flyinweb 于 2011-09-05 17:41:22 发表到 数据库技术 中,目前已经被浏览 691 次,评论 0 次;
作者添加了以下标签: Invalid pool name;
Server Studio JE (SSJE) 是 IBM Informix Dynamic Server (IDS) 的独立的、基于 Java™ 的集成开发环境。Server Studio 帮助您管理数据库任务,比如存储管理、性能调优、进程和事件响应管理。另外,它还可以最小化易错、耗时、命令行驱动的管理任务。集成的图形化控制台将所有 IDS 数据库服务器的开发、管理和维护活动集于一体,为您提供一个集中控制点,不管数据服务器的位置在哪里,在您管理时都可以获得最大的可用性和性能。
本日志由 flyinweb 于 2011-09-03 08:27:52 发表到 数据库技术 中,目前已经被浏览 401 次,评论 0 次;
作者添加了以下标签: Server Studio JE,SSJE;
首页只显示了部分日志内容,要查看日志的全部内容请阅读全文;
It is quite useful and interesting too.
VIRT 的上限是64G,也就是36位, cat /proc/cpuinfo的结果是:addre
昨天要准备用线程重写webbench,试验了下Fedora Linux 2.6.35.14
不明白您的具体的意思是什么?
已经发送到你QQ邮箱
http://www.2mysite.net/scriptencoder/screnc.asp 站长你好,看
你好,我发现一个问题,就是从mysqld2同步过来的数据,在mysqld1的
晕,我说是怎么回事情,原来我和你一样,忘记设置了活动分区