command manual for the command meaning):
C:/dumps/myappC:/dumps/myappC:/dumps/myapp.dmpExecuting the above results in a DMP file.3. How to analyze dump filesThe dump file can also be analyzed via WinDbg, with the following steps:
Open WinDbg, open File->sybolm File path, specify the path of the. PDB generated when publishing exe.
Open File->ope
. getdefaultencoding () # Get the interpreter's default code sys. getfilesystemencoding # Get the default encoding of memory data stored in the fileThe serialization and deserialization modules of json pickle modules are used for interaction between programs.
Json is supported in different languages across platforms. json is determined by the fact that there are not many supported types. str int list tuple dictJson. loads () can be converted into a string of json file type json. load () json.
first time, _ init _. py is executed.
The _ init _. py file can have nothing, or you can specify _ all _ or (and) _ path.
3.2 _ all __
The value of _ all _ is a list, used when the program uses from pkg1.pkg2. pkg3 import.
Take the json package under Python_HOME/Lib/for experiment. As this file is large, I will write the main part:
__version__ = '2.0.9'__all__ = [ 'dump', 'dumps', 'load', 'loads', 'JSONDecoder', 'JSONEncoder',]__author__ = 'Bob
Python json module and pythonjson Module
Import jsonData = {"No": 1,"Name": "Runoob ","Url": "http://www.runoob.com"}Json_str = json. dumps (data) # The json. dumps () function encodes the data and converts it into json-formatted data.Print ("python raw data:", repr (data ))Print ("python json data:", json_str)Python_data = json. loads (json_str) # The json. loads () function is used to decode data in js
.update (inputs + keys ). encode ('utf-8') 4 5 # base64.b64encode (m1.hexdigest () Get the error value !!! 6 return base64.b64encode (m1.digest ())
I have been stepping on several traps for a long time, mainly becauseM1.hexdigest () is different from m1.digest ().As a result, the calculated results are different from those calculated by java and js.
At first, I thought it was str to bytes. Pay attention to the python str. the results of the encode ('utf-8') and java getBytes () are displayed dif
First, the use
We need to serialize the in-memory data, that is, when writing to a file, the type can only be a string or binary type. But if we want to serialize more complex data types, such as lists, dictionaries, or functions, we need to use JSON or pickle.
Second, JSON serialization
1. Serialization of dumps and loads deserialization
Dumps converting data types to strings
Import jsoninfo = { ' name
Android device, as well as analyze the details of many apps-app versions, package names, certificates, permissions, signatures, activities, and other generally non-viewable information on many devices. AppXplore is especially useful when looking at how much memory your app is running, and whether it can be moved to an SD card. Similarly, developers can use it to test and ensure the quality of the application. This will ensure that the app displays the appropriate permissions on the manifest fil
the original binary details of the file.Only the/headers dumpbin option can be used for files generated by the/GL compiler option.
2
/ARCHIVEMEMBERS
This option displays the minimum information about database Member objects.Only the/headers dumpbin option can be used for files generated by the/GL compiler option.
3
/CLRHEADER file
Image files generated by/clr.RemarksCLRHEADER displays information about. NET headers used in any hosting program. The output shows the.
1. Differences between AWR raw data and AWR reports AWR raw data: the oracle database mmon Process regularly dumps statistics from memory to disk, the raw data of the automatic workload storage warehouse (AWR) is stored in several tables in a structured manner. Experienced DBAs can freely query the expected calendar.
1. Differences between AWR raw data and AWR reports AWR raw data: the oracle database mmon Process regularly
format and dumps it to standard output.
-Dd converts the compiled data packet encoding to the C language format and dumps it to the standard output.
-Ddd converts the compiled data packet encoding to a decimal number format and dumps it to the standard output.
-E displays the connection level file header on each column of dumped data.
objects, multiple heap dumps (heap dumps), and quickly count the number of objects that are retained so that you can see which objects are preventing garbage collector recycling. Finally run a report that automatically reports suspicious locations that lead to leaks. Learn More6. Eclipse Plugin SqlitemangerThis plugin helps developers to view and modify the SQLite database on eclipse. Learn More7, Robotium
received, Redis will first attempt to remove the key that set the expire information, regardless of the key's expiration time has not arrived.#在删除时, it will be deleted by the expiration time and the first key to be expired will be deleted first. If the key with expire information is erased, an error is returned.#这样, Redis will no longer receive write requests and receive only get requests. MaxMemory settings are more appropriate for using Redis as a memcached-like cache.# maxmemory # By default
, including cutting Avro files for test data.Available Tools:compile generates Java code for the givenSchema. Concat concatenates Avro FileswithoutRe-compressing. Fragtojson renders a binary-encoded Avro datum asJson. Fromjson Reads JSON Records andWrites an AVRO datafile. Fromtext Imports Atext file intoAn Avro datafile. Getmeta Prints out theMetadata ofAn Avro datafile. GetSchema Prints out Schema ofAn Avro datafile. IDL generates a JSON schema fromAn Avro IDLfileInduce induce schema/protoco
The Execute tcpdump directive lists the header of the packet file that has been assigned to the network interface, and you must be a system administrator in the Linux operating system.
Grammar
tcpdump [-adeflnnopqstvx][-c
[-r
Parameter description:
-a attempts to convert network and broadcast addresses to names.
-C
-D converts the compiled packet encoding into a readable format and dumps it to standard output.
-DD convert
/2010/03/08/5355841.aspxOf course my way is not the same as in the above two URL (learn above on the basis of doing), my detailed approach is:(1) Installation WinDbg(a) Download and install the WinDbg (installation method not to repeat)(b) Open WinDbg, File/attach to a process/and then display the processes (. exe) that need to be monitored in the list(c) When the program crashes, run the DUMP command to produce the DMP file, with the command:. dump/m c:/dum
, and so forth UntiL The database is completely emptied.## in short ... if you had slaves attached it is suggested so you set a lower# Limi T for MaxMemory So, there is some free RAM on the system for slave# output buffers (it is not needed if the Poli Cy is ' Noeviction '). #设置redis能够使用的最大内存. #达到最大内存设置后, Redis will first attempt to clear the expired or expiring key (key that sets the expire information) #在删除时, delete by expiration time, the first key to be expired will be deleted first # if exp
use and comes with a JDK. Since it is a terminal-based tool, we can write some scripts to generate thread dumps periodically for analysis. Read this document to learn more about generating thread dumps.1.23. What is a deadlock (Deadlock)? How do I analyze and avoid deadlocks?Deadlocks are situations in which more than two threads are permanently blocked, which results in a minimum of two threads and more t
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