[code] Today I received an email that asked: I have recently come across your excellent articles on concurrency and the changes in software writing paradigm. They make a lot of sense, but I am having trouble translating them to my world of Telecom oriented web services, where practically everything is run through a DBMS. It seems to me we get everything “free”, simply by using an inherently co...
我把并发量提到600的时候就报错，不是数据库连接限制问题，我设置的是1500个连接 [ 本帖最后由 justlooks 于 2009-9-2 14:22 编辑 ]
Even this topic was covered several times already, the question is still open - use or not to use InnoDB thread concurrency?.. And the only true answer here - "It depends" :-) and I'll try to make a short summary about the current state here. The main current InnoDB bottlenecks are all mostly due to a high contention on internal locks. As all mult...
mysqlslap -uroot -p12345678 --debug-info --auto-generate-sql --auto-generate-sql-load-type=mixed -h 192.168.1.169 -P 3307 --concurrency=305 --number-of-queries=1000 --create-schema=t1 mysqlslap: Could not create thread 有人碰到这个问题么，并发数最大就是304了，数字再大就抱这个错，我测试了好几台mysql都是一样
我的mysql版本是mysql Ver 14.12 Distrib 5.0.45, for redhat-linux-gnu (i686) using readline 5.0 是不是只有5.1以上才有？ [ 本帖最后由 sinxadmin 于 2009-4-20 13:20 编辑 ]
Chapter 2. Thread Safety What is Thread Safety A class is thread-safe if it behaves correctly when accessed from multiple threads, regardless of the scheduling or interleaving of the execution of those threads by the runtime environment, and with no additional synchronization or other coordination on the part of the calling code. Thread-safe classes encapsulate any needed synchronization so tha...
刚开始学习生产者-消费者问题，但是编译过不去 错误显示: undefined reference to `set_concurrency' 我用的系统是Linux2.4.21 希望各位大哥告诉下小弟原因及解决方法
MySQL5.1地的确提供了好多有力的工具来帮助我们DBA进行数据库管理。 现在看一下这个压力测试工具mysqlslap. 关于他的选项手册上以及--help介绍的很详细。 我解释一下一些常用的选项。 这里要注意的几个选项： --concurrency代表并发数量，多个可以用逗号隔开，当然你也可以用自己的分隔符隔开，这个时候要用到--delimiter开关。并发的连接数在redhat 4 update 7 版本最大为303，超过303就会出现:mysqlslap：Could not create threa...
mysql-5.1.34 源码编译 静态链接 # mysqlslap --concurrency=4 --query=run_2.sql --create=cre_2.sql --number-of-queries=50000000 --delimiter=";" 几秒以后就锁死 requeries/s=（35K） mysql-5.1.32 源码编译 # /usr/local/mysql-5.1.32/bin/mysqlslap --concurrency=4 --query=run_2.sql --create=cre_2.sql --number-of-queries=50000000 --delimiter=";" # /usr/local/mysql-5.1.32/bin/mysqlslap --concurrency=5 --...
