I've read several stablity issues with modmono under high load. The root of the problem is GC and the solution is restarting modmono every n hours, and n should be decreased based on error frequency.
I'm planning to develop a heavy load site with mono (I've .net experience and a little java), and I've fears based on this issues like session interruption, http errors ...
At this starting stage of the project, should I switch to Java/tomcat or trust to mod_mono ?
Regards
Depending on how long developing your site (http://www.mono-project.com/Compacting_GC) might be ready for production. While, googleing found some complaints about stability, many were from 2006. Push comes to shove, if mono/mod_mono fail to live up to stability, you could always deploy from windows/iss.
It's a bit of a calculated risk at this point, but if you run into any issues, I'm sure the mod_mono mailing list would help sort out any issues.
Related
After about 40 hours of coding I've completed a gig on Fiverr, but now the client is asking me for the apk file. I tried to build it but I've been stuck for hours and now that I get the error I have a very long list of things to try so I'm wondering if I should be doing this at all... I was paid for developing an app, not for compiling or deploying and no other client has ever asked for the apk file.
Plus probably he will want modifications and I'll have to compile again and for some reason he doesn't want to use Expo and test the app easily.
More context: He said he works on a software company and they have too much work so they had to go to fiverr, so he is not ignorant about what software development is.
He never mentioned compiling and the job title is "develop a react native app", there are other sellers who offer develop and compile, develop and deploy, develop and publish, etc, but not me.
So what do you think, is this part of my job?
This is a frequently encountered problem when I was doing freelance work. I ask myself the following
Is it part of the requirements that were agreed upon.
Will a reasonable person expect it to be implied from the requirements.
Will the usability of the app be substandard if the specified change is not made.
There are usually multiple back-and-forth requests from the client. If I am making a change free of charge, I explain why it is included in our agreement. And when it comes time that the client requests additional things, they are usually very understanding about extra charges.
My opinion on your case
If the agreement were to "develop an android app" from no existing code, it is quite reasonably expected that the app runs in a typical physical device rather than an emulator of your choice. On the other hand, it is not reasonably expected to run on their specific customized equipment, or their emulator or compiler of choice.
Hence, an APK as a deliverable, is quite reasonable.
Recently I have completed migration from M1 to M2. Total of 5 stores reside under single Magento 2 installation in the Cloud now. Page speed is a pain point at this time. Lighthouse and web.dev scans suggesting several areas to be improved, such as bundling JS and reducing JS execution time, as well as minimizing main-thread work. Installed Amasty Page Speed Optimization extension, but it barely made an impact. Installed Magepack JS Bundling tool, and it did make small difference, however still need to get the websites optimized to improve the performance. Can anyone suggest another extension or recommend effective steps to get the sites optimized?
It is difficult to say why your website is slow with limited information.
But you may try following.
Check if site is running in production mode.
All the caches are enabled.
Disable all the custom modules and check if it runs fast with default Magento code?
Try to enable Magento profiler and investigate which code/event etc. is taking more time.
Check Magento logs and Server logs to see if there are any errors or connection timeouts to any third party services.
Once you have some kind of report with which you can identify what is causing slowness. You may decide next course of action.
Whew...ok, been wrestling with this for a while and I can't figure out what is going on.
I am new to Azure caching, but at this point I have read a good bit and I think I have it setup right, but something is obviously wrong so what do I know?
Ok, so first I setup a dedicated caching web worker role using this fine tutorial: http://berniecook.wordpress.com/2013/01/27/distributed-caching-in-azure-cache-worker-role/
I have an ASP.net MVC 4 website that is supposed to be using it.
I have my solution set to multiple starting projects with my cloud caching project set to start first, but no matter what I do, I get the "role discovery data is unavailable".
Sometimes in my output log I get that the Role Environment failed to initialize, but not very often. Most of the time the output log says that is succeeds. Regardless of that, I still get the error above.
I was thinking that maybe the issue was because I was running on local azure storage and compute emulators, so I reconfigured and published the Cloud Service to Azure to see if that helped.
It didn't...
The fun part is that there have been exactly 2 times when it suddenly worked (both when I was working locally). 2 times about of about 100. I didn't do anything different...just ran the debugger and poof, it all worked. This at least lends a bit of credit that it is actually setup correctly.
Needless to say, this is putting a huge damper on my productivity so any advice would be appreciated.
Update
Ok, I have figured out a workaround of sorts...I have learned that the reason that it consistently failed was because the development web server was holding onto a file which prevented the caching server to launch correctly.
The workaround is to stop the web server each and every time I want to recompile and run the code. This is obviously not ideal, so any ways to make this more reliable would be appreciated.
Thanks,
David
I don't know if this helps but I find that if I don't shut down the both the storage and compute emulator, I get weird errors, so after doing an F5 and closing the browser down, I manually shut down both emulators
What exactly happens when we do IISreset? What resources get released? We have an ASP.Net website (.net 1.1) which use Crystal reports 11. Lately, running reports are throwing several crystal report specific exceptions and then the users can't run reports anymore. Resetting IIS lets the users log back in and run the reports until it fails the next time. Knowing exactly what resources are released when IIS is reset will help us dig deeper to find the root cause. Any help?
Pretty much everything. All thread pools, asp, asp.net, shared memory, etc... will all be purged. Doing in IISReset is basically the same as going to Services->WWW Service->Restart. Also, it will affect SMTP and FTP if you are running these services as well.
To narrow your problem down slightly ( and to reduce impact ), you should try putting your website in its own App Pool. Then when it next hangs, see if restarting the app pool fixes the problem. Then you are limiting things to just one running web application, not completely taking down iis. If the problem persists and still requires an IISReset, you at least have one more datapoint to work with.
EDIT: In response to your additional comment, I would suggest you do as much logging as possible and see if the problem becomes obvious. http://learn.iis.net/page.aspx/579/advanced-logging-for-iis-70---custom-logging/
Obviously, a quick run through Event Viewer is probably a good idea.
I'm investigating the use of mono in real world high traffic web applications. There are some references on the mono site (companies using mono), but I couldn't find a high traffic website sample other than Deki powered ones. And I've read some mailings about mod_mono stability problems because of inexistence of compacting GC.
Please reference your app and give some info, if is there anyone using mono in production.
...or do I have to look at Java ?
Regards,
sirmak
Wikipedia is using Mono for search (also listed on the companies using Mono page)
A ton of people use Mono in production and development. I'm sure this page will change dramatically over the next year or so, but look at http://www.mono-project.com/Companies_Using_Mono. This is a good reference, but projects using Mono are popping up every day, so we'll see more soon.
Lunchwalla.com uses Mono for its website. It receives fairly high traffic. There is also a little blog item regarding the set up - http://blog.lunchwalla.com/2010/04/23/the-tech-behind-lunchwalla/
Go for it. Beyond the initial setup work and tuning you can have a very stable and fast server with all the advantages of low-resource required do the the job, at least with nginx/lighttpd. mod_mono (Apache) resources will go way faster according to a lot of feedback I've been reading on the all the major places this topic is discussed
From #mono (IRC)
<ruionwriting> ahall: in apache what is your feel about the performance compared with nginx?
<ahall> the fastcgi implementation is just a bit buggy and buy sending few concurrent requests to it it hogged 99% cpu and didn't get out of it. I will switch to nginx + fastcgi as soon as its suitable for me in production
<ahall> buy = by
<ahall> but yeah i always use nginx instead of apache whenever possible, but with mono i dont recommend it
This last part I don't have to agree based on the setup I have.
This question on stack overflow must me included here.