A thread is the smallest entity of execution within a program.

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“No more threads can be created in the system” in Network and Sharing Center

A while back I noticed on one of our laboratory computers (Windows 7, very little extra software installed) that the network connection icon in the system tray would claim that it had no network ...
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Apache stopped working permanently after error “Server ran out of threads to serve requests.”

I have been working with Apache for more than 8 years, but now I'm facing a severe problem and I couldn't find a solution on internet so far. I'm running Apache 2.2.15 32bit on a Windows 2008 R2 ...
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Java process thread details

I'd like to get the details like name, running time, etc. of threads of a Java process on a production VM, similar to the info that VisualVM shows in the Threads tab. Unfortunately, VisualVM won't run ...
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How do I reduce the threads per process limit for an ISAPI app under IIS 7.5

I have a python WSGI application running under an ISAPI extension in IIS 7.5 on Windows Server 2008. I would like to increase the number of worker processes (which I know how to do) and reduce the ...
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debugging stuck apache/php thread on production server

I have a linux system with apache httpd and PHP which is loaded using LoadModule php5_module /usr/lib/apache2/modules/libphp5.so. I've enabled the mod_status module of apache and I see a particular ...
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What is optimal IIS threading settings for a Win2012 server that does lots of slower web service calls?

We have a Windows 2012 Server that communicates to lots of other services via SOAP based web services using ASP.Net and .NET 4.5. These services tend to have higher latency (i.e. 2-6 seconds to ...
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994 views

What is a fast, efficient method for threading rsync

I have a single root directory (on a NAS) that I need to backup to another server. The hierarchy of the directory is several layers deep and a majority of the data is composed of extremely large ...
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Apache worker mpm, one process and many threads: understanding performance

Got a mod_perl-written serverside program. Im using shared apache worker mpm memory with one process only, and ~ 60 threads. Im using locks to temporary secure the access to the shared memory, just 0....
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Python Threads and uWSGI Harakiri

I have a webapp that is using an API built on nginx, uWSGI, and Django. Recently I have been seeing a lot of harakiris on a particular API call which does some quick processing and then spawns a few ...
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OOM using CRON but not using SHELL

When I start a java program by shell, everything is working well. However if I start the same program with the same command and same user by CRON, I get a java.lang.OutOfMemoryError just after a few ...
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determine if threads on a cpu are blocked? What are the causes of thread blocks?

The load-average reported by uptime command also displayed in top provides the the average run-queue length over time (1, 5 and 15 minutes) The run-queue length is the sum of the number of threads (...
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453 views

IIS Worker Process Thread Count

I've seen this question asked but the answer given was either insufficient or unrelated. I feel like this is a pretty simple question(s). We have a Classic ASP app running on IIS7.5 on a Windows 2k8 ...
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Taking a thread dump on IBM J9 takes a long time

I'm trying to collect a java core on AIX (java version 1.6). There is only one dump agent configured, which collects a system dump, heap dump and java core on every SIGQUIT, so I used HealthCenter to ...
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488 views

How to tell uWSGI to prefer processes to threads for load balancing

I've installed Nginx + uWSGI + Django on a VDS with 3 CPU cores. uWSGI is configured for 6 processes and 5 threads per process. Now I want to tell uWSGI to use processes for load balancing until all ...
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306 views

IIS 7 configuration does not lead to expected performances/thread count

I have a Windows Server 2008 R2 server running some web services through IIS 7. The web services run in integration mode with .NET Framework 2.0. The web services communicate with each other and with ...
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384 views

Linux watchdog and timing interval

How does the /dev/watchdog timer exactly work? I found a description here and it says that once I open the file from an application I need to update it every 10 seconds. I was wondering is this a ...
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Apache serving Samba share leads to poor performance?

This is a question about a problematic interaction between Apache and Samba. Our Linux server (on a private intranet) mounts a Windows share, which is physically thousands of miles away, and serves ...
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Are memory and thread managers on Windows Server 2008 R2 and Windows 7 Home/Prof/Ultimate same?

I was asking one question on DBA site, and I got a reply, that implies, that Windows Server 2008 R2 and Windows 7 Home/Prof/Ultimate have different memory and thread managers. Is this correct?
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tomcat max number of threads

I have a very confusing scenario.. We are using tomcat6 to host an internal application. In server.xml file maxthreads attributes is set to 150 but if I log on to the manager, in "http-8080" section I ...
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Tomcat server unresponsive with use, sitting behind nginx

I have a Tomcat7 sitting behind nginx. It's fine to start with but after a bit of time and a bit of use it becomes unresponsive. I have taken a few thread dumps, but nothing seems to change. There are ...
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980 views

IIS Threads Per Processor Max

We have IIS 7 running a classic ASP app. We noticed that while the CPU stays low, the ASP Request Queue can sometimes get high, causing slow response times. After some research it seems changing the ...
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WebSphere hung threads, how can I track then down?

We have an application running on WebSphere (unfortunately it is 6.1 which is no longer supported, it has not yet been migrated in production to a later version) which becomes entirely unresponsive ...