Re: Pylons hosting on a VPS (memory usage)
I am running 3 pylons apps on a single VPS with 256 MB ram (no swap space). I am using apache in multi threaded mode and mod_wsgi. Every 2 to 3 months I restart the apache server, because the apache child processes gradually grow in memory size, reaching slowly the 256 MB limit on busy days. Ruben On 20 apr, 00:28, Alex a...@oxygencomputers.co.uk wrote: Hi all, Does anyone have any advice on hosting multiple Pylons apps in a low memory environment like a VPS. I've written a few apps using Pylons and it's great, so I'd like to use it for more. However the stuff I've used it for so far has justified running the apps on servers of their own, so I've been running them using paste behind lighty. However this seems to need quite a bit of RAM. I'd like to be able to host quite a few low traffic volume apps on the same VPS, but it seems that running several paste instances wouldn't be possible in the same way it's possible to host lots of low traffic PHP apps behind Apache and mod_php. Anyone have any advice on deployment? TIA. Alex -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/pylons-discuss?hl=en. -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Re: Pylons hosting on a VPS (memory usage)
On Apr 21, 7:57 pm, cropr ruben.dec...@gmail.com wrote: I am running 3 pylons apps on a single VPS with 256 MB ram (no swap space). I am using apache in multi threaded mode and mod_wsgi. Every 2 to 3 months I restart the apache server, because the apache child processes gradually grow in memory size, reaching slowly the 256 MB limit on busy days. You are presumably using daemon mode of mod_wsgi else this wouldn't even likely be possible. Anyway, read 'http://blog.dscpl.com.au/2009/11/save-on-memory-with- modwsgi-30.html'. It explains how to counter the leaks in Python which occur on an Apache restart. Graham Ruben On 20 apr, 00:28, Alex a...@oxygencomputers.co.uk wrote: Hi all, Does anyone have any advice on hosting multiple Pylons apps in a low memory environment like a VPS. I've written a few apps using Pylons and it's great, so I'd like to use it for more. However the stuff I've used it for so far has justified running the apps on servers of their own, so I've been running them using paste behind lighty. However this seems to need quite a bit of RAM. I'd like to be able to host quite a few low traffic volume apps on the same VPS, but it seems that running several paste instances wouldn't be possible in the same way it's possible to host lots of low traffic PHP apps behind Apache and mod_php. Anyone have any advice on deployment? TIA. Alex -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/pylons-discuss?hl=en. -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/pylons-discuss?hl=en. -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Re: Pylons hosting on a VPS (memory usage)
On Mon, Apr 19, 2010 at 3:28 PM, Alex a...@oxygencomputers.co.uk wrote: Hi all, Does anyone have any advice on hosting multiple Pylons apps in a low memory environment like a VPS. I've written a few apps using Pylons and it's great, so I'd like to use it for more. However the stuff I've used it for so far has justified running the apps on servers of their own, so I've been running them using paste behind lighty. However this seems to need quite a bit of RAM. I'd like to be able to host quite a few low traffic volume apps on the same VPS, but it seems that running several paste instances wouldn't be possible in the same way it's possible to host lots of low traffic PHP apps behind Apache and mod_php. Anyone have any advice on deployment? I've seen a few reports of small Pylons applications taxing the resources of low-memory servers, more than the applications' apparent size or traffic would indicate. I don't know how widespread the problem is or what specifically might be the culprit. If you're using mod_wsgi, I would follow the advice others have mentioned in this thread. -- Mike Orr sluggos...@gmail.com -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Re: Pylons hosting on a VPS (memory usage)
i'm running pylons apps on a few VPS my issues have been this: - the database takes up a lot of ram - the search engine takes up a lot of ram pylons app performance has been better as more ram is tossed in. if you're running a DB like postgres or mysql on the same vps, i would probably use 512mb ram as a minimum... 256 could work. if you're running anything like solr/lucene as well, i'd defintely consider 512 a minimum in terms of the apache issues indicated above -- were they on the master or child processes ? you should be able to mitigate that behavior on the children by tweaking max_requests also, as i remember from my mod_perl days, apache doesn't like to free memory on a restart. you need to explicitly stop then start. -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Re: Pylons hosting on a VPS (memory usage)
On Apr 21, 2:51 pm, Jonathan Vanasco jonat...@findmeon.com wrote: also, as i remember from my mod_perl days, apache doesn't like to free memory on a restart. you need to explicitly stop then start. There is still an issue with the OOM killer that kills an apache child and leaves the shared memory segments active. With apache stopped, ipcs | grep www-data (or the username that apache runs under) and you might still see some stale semaphore arrays stuck. -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Pylons hosting on a VPS (memory usage)
Hi all, Does anyone have any advice on hosting multiple Pylons apps in a low memory environment like a VPS. I've written a few apps using Pylons and it's great, so I'd like to use it for more. However the stuff I've used it for so far has justified running the apps on servers of their own, so I've been running them using paste behind lighty. However this seems to need quite a bit of RAM. I'd like to be able to host quite a few low traffic volume apps on the same VPS, but it seems that running several paste instances wouldn't be possible in the same way it's possible to host lots of low traffic PHP apps behind Apache and mod_php. Anyone have any advice on deployment? TIA. Alex -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
Re: Pylons hosting on a VPS (memory usage)
On Apr 19, 6:28 pm, Alex a...@oxygencomputers.co.uk wrote: Does anyone have any advice on hosting multiple Pylons apps in a low memory environment like a VPS. I've written a few apps using Pylons and it's great, so I'd like to use it for more. However the stuff I've used it for so far has justified running the apps on servers of their own, so I've been running them using paste behind lighty. However this seems to need quite a bit of RAM. I'd like to be able to host quite a few low traffic volume apps on the same VPS, but it seems that running several paste instances wouldn't be possible in the same way it's possible to host lots of low traffic PHP apps behind Apache and mod_php. mod_wsgi is one method. http://pylonsbook.com/en/1.1/deployment.html#setting-up-a-virtual-host nginx - uwsgi - pylons http://tonylandis.com/python/deployment-howt-pylons-nginx-and-uwsgi/ word of note, 0.9.5-rc1 had a few issues There is also cherokee which has native uwsgi support I believe lighttpd also has support for uwsgi. You can also use fcgi/flup to deploy pylons projects -- You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-disc...@googlegroups.com. To unsubscribe from this group, send email to pylons-discuss+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en.
