大约有 7,500 项符合查询结果(耗时:0.0168秒) [XML]

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How many threads can a Java VM support?

...ogram which spawns 25,000 threads and all those threads write some data in MySql database at regular interval of 2 seconds. I ran this program with 10,000 threads for 30 minutes continuously then also my system was stable and I was able to do other normal operations like browsing, opening, closing...
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Why is Magento so slow? [closed]

...o slow Parts of Magento use an EAV database system implemented on top of MySQL. This means querying for a single "thing" often means querying multiple rows There's a lot of things behind the scenes (application configuration, system config, layout config, etc.) that involve building up giant XML ...
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Why is IntelliJ 13 IDEA so slow after upgrading from version 12?

...it integration by opening the project settings dialog and deleting the git root, and the problem goes away. I tried disabling all of the GIT background operations through the 13 UI, but it didn't make a difference. I also tried both GIT built-in and native modes, and it made no difference. In my ...
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How to tell bash that the line continues on the next line

...st character before the end of line character. Consider this command: mysql -uroot \ -hlocalhost If there is a space after \, the line continuation will not work. The reason is that \ removes the special meaning for the next character which is a space not the invisible line feed cha...
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Why do you program in assembly? [closed]

...mpiler to figure out exactly what to optimize. Quake's fast inverse square root. Again, the routine doesn't have assembler in it, but you need to know something about architecture to do this kind of optimization. The authors know what operations are fast (multiply, shift) and which are slow (divid...
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Is there a way to automate the android sdk installation?

...ges that have not already been accepted. Common Arguments: --sdk_root=<sdkRootPath>: Use the specified SDK root instead of the SDK containing this tool --channel=<channelId>: Include packages in channels up to <channelId>. ...
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When increasing the size of VARCHAR column on a large table could there be any problems?

... That's because you're not using SQL Server per the question (but MySQL, probably). "ALTER TABLE ... MODIFY" is not valid T-SQL. – Jeroen Mostert Nov 27 '14 at 9:08 a...
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Multiple select statements in Single query

I am generating a report in php (mysql), 6 Answers 6 ...
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How to find where gem files are installed

...shims - /Users/ttm/.rbenv/bin - /Users/ttm/bin - /usr/local/mysql-5.6.12-osx10.7-x86_64/bin - /Users/ttm/libsmi/bin - /usr/local/bin - /usr/bin - /bin - /usr/sbin - /sbin - /usr/local/bin Notice the two sections for: INSTALLATION DIRECTORY GEM PA...
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How to get active user's UserDetails

...rgument resolver. Your spring configuration in the servlet context not the root context, right? – Jay Aug 25 '12 at 14:50 ...