Skip to main content

memory - ASP.NET not seeing RAM Upgrade?



For several years we've hosted an ASP.NET 4.5 application on the same VM as a SQL Server 2008R2 database in 4GB of RAM. Performance was good.



Our application is a catalog and we use .NET memory cache heavily to build up a 'working set' of parts and related data. 80,000-90,000 cache entries is typical.




Over the past weekend we upgraded to 8GB of RAM and we're seeing odd memory behavior with the ASP.NET application.



After the upgrade, Task Manager tells us that we're only using 60% of the RAM. SQL is very responsive. But cache entries grow to 15,000 and then get trimmed back to 7-8,000 range. There is lots of GC activity. It's as if the ASP.NET application is under memory pressure, and yet there's another 3+ GB of unused RAM out there.



Why would this be? Everything is 64bit. Nothing else has changed. There are no memory limits set on SQL or the Application Pool. The application is not recycling, just trimming cache very aggressively. Any ideas?


Answer



It turns out SQL was hogging a lot more memory than I thought it was. Before when the machine had just 4GB I let SQL run with the default min- and max-memory settings. It ran just fine for two+ years. After upgrading to 8GB RAM it gobbled it all up and ASP.NET WAS starved. I set max-memory to 5GB last night and things are nice and quiet this morning. I don't want to jinx it, but i think task manager's memory reporting lies like a friggin' rug! I am going to diddle with the 5GB over the next few days looking for the sweet spot.


Comments

Post a Comment

Popular posts from this blog

iLO 3 Firmware Update (HP Proliant DL380 G7)

The iLO web interface allows me to upload a .bin file ( Obtain the firmware image (.bin) file from the Online ROM Flash Component for HP Integrated Lights-Out. ) The iLO web interface redirects me to a page in the HP support website ( http://www.hp.com/go/iLO ) where I am supposed to find this .bin firmware, but no luck for me. The support website is a mess and very slow, badly categorized and generally unusable. Where can I find this .bin file? The only related link I am able to find asks me about my server operating system (what does this have to do with the iLO?!) and lets me download an .iso with no .bin file And also a related question: what is the latest iLO 3 version? (for Proliant DL380 G7, not sure if the iLO is tied to the server model)
Post a Comment
Read more

linux - Awstats - outputting stats for merged Access_logs only producing stats for one server's log

I've been attempting this for two weeks and I've accessed countless number of sites on this issue and it seems there is something I'm not getting here and I'm at a lost. I manged to figure out how to merge logs from two servers together. (Taking care to only merge the matching domains together) The logs from the first server span from 15 Dec 2012 to 8 April 2014 The logs from the second server span from 2 Mar 2014 to 9 April 2014 I was able to successfully merge them using the logresolvemerge.pl script simply enermerating each log and > out_putting_it_to_file Looking at the two logs from each server the format seems exactly the same. The problem I'm having is producing the stats page for the logs. The command I've boiled it down to is /usr/share/awstats/tools/awstats_buildstaticpages.pl -configdir=/home/User/Documents/conf/ -config=example.com awstatsprog=/usr/share/awstats/wwwroot/cgi-bin/awstats.pl dir=/home/User/Documents/parced -month=all -year=all...
Post a Comment
Read more

linux - How can I get my mediawiki to stop thinking I have cookies disabled?

I've searched half a day for how to resolve this issue, and can't figure it out. Shortly after I made my wiki a simple private wiki according to the instructions at Mediawiki's website, it started giving me this weird login error message: Wiki uses cookies to log in users. You have cookies disabled. Please enable them and try again. If I remove those private wiki settings, the error disappears, even if I try logging in. But I need it to be a private wiki for only my team. So what do I do? Here's what I've done so far. Just to be safe, after ever change, I try rebooting Apache using: sudo /etc/init.d/apache2 restart In my php.ini file, I have the following set: session.save_path = "/var/lib/php5" session.cookie_secure = secure session.cookie_path = /tmp session.cookie_domain = my server's internal URL (should I even set this? this field was blank before, but not commented out) session.referer_check = Off I ran the following to ensure that the fold...
Post a Comment
Read more