dstat | Versatile resource statistics tool ( the real one | Security library
kandi X-RAY | dstat Summary
kandi X-RAY | dstat Summary
Due to actions taken by RedHat to hijack the DSTAT name, further development of this project has ceased. Development of this project is taking place on the Dool fork. So long and thanks for all the fish.
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Top functions reviewed by kandi - BETA
- Main entry point .
- Executes an update .
- Print a variable .
- Prints the help of a system resource .
- Compute dev .
- Sets the current theme .
- Display plugins .
- Get cpu number of processors .
- Prepares the counter .
- Get info from redis
dstat Key Features
dstat Examples and Code Snippets
Lines of Code : 23
License : No License
Copy./mypumpkin.py --help
Only mysqldump or mysql allowed after mypumpkin.py
usage: mypumpkin.py {mysqldump|mysqls} [--help]
This's a program that wrap mysqldump/mysql to make them dump-out/load-in
concurrently. Attention: it can not keep consistent fo usage: dstat.py [-h] [--address ADDRESS] [--report] [--sort SORT] [--update]
[--filename FILENAME]
dstat | Statistics tool for Dystopia
optional arguments:
-h, --help show this help message and exit
--address ADDRESS,
[STAT] Rows Fetched : 21842
[STAT] Time to load queries : 3 msec
[STAT] Time to register Driver : 632 msec
[STAT] Time to connect : 1045 msec
[STAT] Time to alter session : 0 msec
[STAT] Time to prep Statement : 3 msec
[STAT] Time to execute query Community Discussions
Trending Discussions on dstat
QUESTION
I wrote a program that writes buffered IO:-
...ANSWER
Answered 2020-Jun-06 at 09:53Following kernel parameters are used by pdflush/flush/kdmflush:
QUESTION
I am trying to generate random numbers from a chosen distribution with specified parameters and then see if the numbers are indeed following that distribution using the Kolmogorov-Smirnov test.
...ANSWER
Answered 2020-May-12 at 20:04If I am passing the full list of distribution parameters to the arg parameter I get what you expect, namely:
QUESTION
The Context
I'm currently running tests with Apache Cassandra on a single node cluster. I've ensured the cluster is up and running using nodetool status, I've done a multitude of reads and writes that suggest as such, and I'm confident my cluster is set up properly. I am now attempting to speed up my throughput by mounting a SSD onto the directory where Cassandra writes its data to.
My Solution
The write location of Cassandra data is generally to /var/lib/cassandra/data, however I've since switched mine using cassandra.yaml to write to another location, where I've mounted my SSD. I've ensured that Cassandra is writing to this location by checking the size of the data directory's contents through watch du -h and other methods. The directory I've mounted the SSD on includes table data, commitlog, hints, a nested data directory, and saved_caches.
The Problem
I've been using YCSB benchmarks (see https://github.com/brianfrankcooper/YCSB) to test the average throughput and ops/sec of Cassandra. I've noticed no difference in the average throughput when mounting HDD vs. SSD on the location where Cassandra writes its data to. I've analyzed disk access through dstat -cd --disk-util --disk-tps and found HDD caps out on CPU usage in multiple instances whereas SSD only spikes to around 80% on several occassions.
The Question
How can I speed up the throughput of Cassandra using a SSD over a HDD? I assume this is the correct place to mount my SSD, but does Cassandra not utilize its extra processing power? Any help would be greatly appreciated!
ANSWER
Answered 2020-Mar-22 at 10:34SSD should always win over the HDD in terms of latency, etc. It's just a law of physics. I think that your test simply didn't provide enough load on the system. Another problem could be that you mount only data to SSD, but not the commit logs - on HDDs they should be always put onto a separate disk to avoid clashes with data load. On SSDs they could be put on the same disk as data - please point all directories to SSD to see a difference.
I recommend to perform a comparison by using following tools:
- perfscripts - it uses
fiotool to emulate Cassandra-like workloads, and if you run it on the both HDDs & SSDs, then you will see the difference in latency. You may not even execute it - just lookhistoricfolder, where there are results for different disk types; - DSBench - it was recently released by DataStax team, who is specializing in benchmarking Cassandra and DSE. There are built-in workloads described in wiki, that you can use for testing. Only make sure that you run the load long enough to see the effect of compaction, etc.
QUESTION
I was trying to use by to gain both the mean and sd for data
here is my code
...ANSWER
Answered 2020-Feb-29 at 20:49by works on the data.frame that is split by mtcars$am, so your function needs to work on a data.frame instead of a vector, so example below I use sapply to go through each column and calculate mean and sd:
QUESTION
subprocess.Popen('dstat --output stats.csv', shell=True, stdout=subprocess.PIPE).stdout.read()
ANSWER
Answered 2019-Aug-26 at 01:38You're writing the CSV output of dstat command to stats.csv file.
The output should be read from stats.csv file and not stdout unless you remove --output option passed in the command.
QUESTION
I've found a couple of others asking for help with this, but not specifically what I'm trying to do. I have a dictionary full of various formats (int, str, bool, etc) and I'm trying to save it so I can load it at a later time. Here is a basic version of the code without all the extra trappings that are irrelevant for this.
...ANSWER
Answered 2019-Aug-18 at 04:21Use module json.
QUESTION
I'm using Infragistics UltraChart controls for displaying graphs. (Version 19.1) My line chart graph is as below
Here Y-axis is noting but milliseconds(turn around time of Int64 type), I want to display it like "days:hh:mm:ss" format. Is it possible to display Y- axis lables in this format? while X axis is showing list of sample names (Which is of string type) The Ultra line chart data binding code is as below
ANSWER
Answered 2019-May-06 at 23:26To format data for the X/Y axis labels the IRenderLabel interface can be used. In example below the DateTimeRenderer class is using the IRenderLabel interface implementation to display Y-axis labels in the DateTime format:
For additional information see the Infragistics documentation:
http://help.infragistics.com/Help/Doc/WinForms/2011.1/CLR2.0/html/Chart_Customize_Labels_Using_the_IRenderLabel_Interface.html
DateTimeRenderer.cs
QUESTION
I made the localization for the classes ReportGenerator and HTMLReport, which can be found in the dspace-api.jar, so my html reports would be generated in my language, but it's still being generated in english, is there anything else I need to do? ps. I did generate a new jar, replaced the older one for the new localized version, restarted the tomcat and translated the dstat.map too.
...ANSWER
Answered 2018-Aug-24 at 14:50In a typical DSpace installation, there are multiple copies of the dspace-api jar file. If I run the following from the [dspace-install] directory, you will see the following:
QUESTION
I had created a script to reboot system after 90% Cpu utilisation. But for some testing purpose i changed the Vlaue of Cpu Utilisation to 0.7%. And script is programmed to run system reboot. Because of that Server never online it has got into some infinite reboot loop.
My Script :
...ANSWER
Answered 2018-Apr-26 at 22:20- stop the instance
- detach the root volume
- attach it to another instance, already running, in the same availability zone
- mount it at
/mnt - fix the misconfiguration by editing the file, which you should find at
/mnt/home/ubuntu/reboot.sh - unmount
- detach
- reattach to the original instance
- start the instance
QUESTION
I am attempting to wade into the pool of MVC for RPG ILE. So I have two modules VIEW, and MODEL, that are bound to my main program CNTRL. I validate information entered in my VIEW module with calls to the MODEL module, and then pass back to the View any errors. When I try to use the QHNSNDPM api, I see the error in the job log, followed by CALL STACK ENTRY NOT FOUND. I tried to find theVIEW module on the call stack, and it is not there. Not being super strong in DDS and the ILE, I am not sure how/what to do about this error. Any Suggestions would be greatly appreciated!
The DCL-F DISPLAY WORKSTN; is in the VIEW module.
And now for a little code from the VIEW Module....
...ANSWER
Answered 2017-Nov-17 at 01:31Keeping track of the current stack level can be tricky.
Keep in mind that when you're inside of a procedure the stack level is increased by 1. So if your current stack level is 1 and you call a procedure, the stack level inside of the procedure is 2.
In my apps I declare a global variable that's initialized to 1. Upon entry to a procedure I add 1 to that variable and upon exiting I subtract 1. That variable is passed to the QMHSNDPM API.
As an aside, a call to a subroutine does not add 1 to the stack.
Hope this helps.
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Vulnerabilities
No vulnerabilities reported
Install dstat
You can use dstat like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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