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How to debug Lock wait timeout exceeded on MySQL?
...erages calculated from the last 4 seconds
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 9014315, signal count 7805377
Mutex spin waits 0, rounds 11487096053, OS waits 7756855
RW-shared spins 722142, OS waits 211221; RW-excl spins 787046, OS waits 39353
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ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...地找出和判断ros的运行状态，调试信息是非常重要的。从操作系统得到默认的调试输出很容易，但是这些输出对于定位问题尤其是bugs没有太大作用。
本文旨在告诉读者如何生成有用的调试信息，通过这些信息可以直接判断出操...
MFC子窗口和父窗口（SetParent,SetOwner） - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC子窗口和父窗口（SetParent,SetOwner）在windows系统中，每个窗口对象都对应有一个数据结构，形成一个list链表。系统的窗口管理器通过这个list来获取窗口信息和管理每个窗口。一、概念和区别
在windows系统中，每个窗口对象都对...
Eclipse Kepler for OS X Mavericks request Java SE 6
I have just made a clean installation of OS X Mavericks , and I have downloaded Eclipse Kepler , but if I execute it, gives me this message:
...
How do I pass a string into subprocess.Popen (using the stdin argument)?
...e,
you need to give stdout=PIPE and/or
stderr=PIPE too.
Replacing os.popen*
pipe = os.popen(cmd, 'w', bufsize)
# ==>
pipe = Popen(cmd, shell=True, bufsize=bufsize, stdin=PIPE).stdin
Warning Use communicate() rather than
stdin.write(), stdout.read() or
stderr.read()...
what does the __file__ variable mean/do?
...that determine path at runtime, and I would really like to understand the os.path module so that I can start using it.
5 ...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...部分，Windows自身的运行也调用这些API函数。
在DOS下，操作系统的功能是通过各种软中断来实现的，如大家都知道int 21h是DOS中断，int 13h和int 10h是BIOS中的磁盘中断和视频中断。当应用程序要引用系统功能时，要把相应的参数...
Python's os.makedirs doesn't understand “~” in my path
...
You need to expand the tilde manually:
my_dir = os.path.expanduser('~/some_dir')
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Android emulator freezing OS X v10.9 (Mavericks) with HAXM
I just updated to OS X v10.9 (Mavericks), and now whenever I start up any of my emulators, as soon as the emulator starts up, my entire computer freezes with a spinning progress indicator in the center of the screen (not a beachball, the progress indicator is similar to what you see when shutting...
.a: error adding symbols: File format not recognized 原因 - 操作系统(...
.a: error adding symbols: File format not recognized 原因error-adding-symbols-file-format-not-recognizedlinux,gccLinux编译链接时报错：xxx a: error adding symbols: File format not recognized。也可能出现编译能通过，但ldd报链接失败不能运行。原因是：在低版本Linux...