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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...解决：
MongoDB按需自动生成数据文件：先是<DB>.0，大小是64M，然后是<DB>.1，大小翻番到128M，到了<DB>.5，大小翻番到2G，其后的数据文件就保持在2G大小。为了避免可能出现的问题，可以采用事先手动创建数据文件的策略：
#!/bin...
How to avoid reinstalling packages when building Docker image for Python projects?
...0fd94
Step 2 : ADD ./requirements.txt /srv/requirements.txt
---> b6c19f0643b5
Removing intermediate container a4d9cb37dff0
Step 3 : RUN pip install -r requirements.txt
---> Running in 4b7a85a64c33
Downloading/unpacking pytest==2.3.4 (from -r requirements.txt (line 1))
Running setup.py (path:...
How does one create an InputStream from a String? [duplicate]
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WhiteFang34WhiteFang34
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a...
Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
..._server <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 64696f7e
r0 00000000 r1 00000001 r2 ad12d1e8 r3 7373654d
r4 64696f72 r5 00000406 r6 00974130 r7 40d14008
r8 4b857b88 r9 4685adb4 10 00974130 fp 4b857ed8
ip 00000000 sp 4b857b50 lr afd11108 pc ad115ebc cpsr 20...
Quickly find whether a value is present in a C array?
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barak manosbarak manos
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How to check if array is empty or does not exist? [duplicate]
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Robby CornelissenRobby Cornelissen
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What is the meaning of “non temporal” memory accesses in x86
...ntent is directly written to memory.
Source: http://lwn.net/Articles/255364/
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Is there a way to remove the separator line from a UITableView?
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64
You can do this in the storyboard / xib editor as well. Just set Seperator to none.
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手握利器，直面“蓝脸”! ——使用WinDbg抗击系统崩溃 - 操作系统(内核) - ...
...gging/default.mspx，具体项目为Install Debugging Tools for Windows 32/64-bit Version。
使用WinDbg分析崩溃时的内存转储文件的前提是您要让系统在崩溃时自动生成一个内存转储文件，做法如下：
1、单击开始，然后单击运行。
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Where is the Keytool application?
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keytool is part of the standard java distribution.
In a windows 64-bit machine, you would normally find the jdk at
C:\Program Files\Java\jdk1.8.0_121\bin
It is used for managing keys and certificates you can sign things with, in your case, probably a jar file.
If you provide more deta...