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Questions tagged [multi-threading]

79 questions
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multithreading a single threaded application worker

I have a server which I want to dedicate for converting doc files to pdf via LibreOffice. The server has 6 cores and LibreOffice is single threaded. This means that generating a single pdf uses 16.666% of my total CPU power. Converting a file can be…
cherouvim
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How does Apache process several requests at a time?

If 10 requests hit Apache, does it process them one by one, so when R3 finishes, then it starts to run R4, or does it fire 10 processes/threads/whatever and are resolved simultaneously? Now some background: I have a PHP script that takes up to two…
Vicenç Gascó
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DNS doesn't resolve some domains on huge amount of requests

I need to check 200kk (200,000,000) domains for availability and CMS information. I'm using php 7.1 and simulating multi-thread check. Hardware and config The server hardware: Multicore CPU, 64GB RAM, SSD disks, 500 Mbits dedicated bandwidth (OVH…
Jekis
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Copying files using multi threading increases performance - Why?

When copying files from one location to another, the most used resources are memory (buffers) and I/O on the devices. However, when using a multi threaded copy utility such as Robocopy, when you specify a large number of threads the performance…
NoChance
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How does a server (e.g. web) manage multiple request/connections?

I read that apache has a solution to create new thread per new request, but I still have some questions. How is possible that one server can manage thousands (even a milion connection - depends from the app) at the same time? Does this depends from…
user155293
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Is there a way to check resource utilization on a cluster running SLURM?

Not sure if this question fits better here or at Unix.SE but I figured it feels more appropriate here. I am running some computation-heavy research on a national cluster which uses SLURM for scheduling jobs. I realized that a part of my batch…
posdef
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The apache2handler SAPI is not supported by pthreads

It has been weeks now that I cannot install pthreads. I am going to list the error logs then I will list my configuration options. These are the errors I get:(Apache Error Log) The apache2handler SAPI is not supported by pthreads in Unknown on line…
D.elp
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Django mutli-threading on apache/mod_wsgi/windows

I am quite new to the combination of apache and django and quite naive frankly regarding to how multi-threading is handeled. Specifically I run on a windows server, so I know the MPM is only thread-based. I have an application which serves a…
Ilan lewin
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Linux: Finding the system processes which are at the top

I am running a multithreaded program on my 8-core processor. top command shows 8 processes are running and each one utilizes a core by 100%. The problem is that only 21% are marked as user cpu and my application is running so slow: Cpu(s): 20.6%us,…
lashgar
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Python multithreading not working on VPS server

I am running an python multithreaded application with multiple processes which scrapes data from some websites. While running on my localhost It works great, but on the vps server I am using( Centos 5.8, 2.6 GHZ with 4 cores) performs very slow.…
Sabirul Mostofa
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Poor SSL performance with vsftpd

I'm trying to tweak vsftpd to achieve maximum performance for my usage: I have only one or two clients that connect to the server. File size is between ~15MB and 1GB. Typical transfer batch represent between 1 and 2GB of data. For testing…
petrus
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CPU Utilization of a multithreaded process

Background: I have a whole mess of systems running the 2.6.20 and 2.6.22 kernel in what started as a Fedora Core 2 install several years ago. These systems have 8 cpus, as reported by cat /proc/cpuinfo. My question is, when a process is running…
Justin Bennett
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Do Nginx performe better on Linux compared to Apache?

Apache vs Nginx are compared performance wise since Apache is based on threads (for each new connection a new thread) and nginx is based on process (for each new connection to the server a new process). So Nginx perform better since process based.…
user737498
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Why my server has a lot of mysql threads?

I noticed my server is consuming almost 500 MB of RAM, with 19 threads started, as shown in the following image. MYSQL Threads top image: Here is the configuration: -------- General Statistics -------------------------------------------------- [--]…
daniol
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Threading of PGP Whole Disk Encryption on server

I wish to use a 2010 vintage quad core Xeon server to periodically encrypt 500GB eSATA drives. I have three questions: 1) I assume the current version of WDE is fully multi-threaded and throughput scales roughly linearly with the number of…
Lunatik
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