Generational GC (Garbage Collector) - A post-it analogy

re: Generational GC (Garbage Collector) - A post-it analogy

Tess — Tue, 26 Feb 2008 18:38:18 GMT

Just have to add this link to a recent Channel 9 interview with Patrick Dussud about the GC http://channel9.msdn.com/ShowPost.aspx?PostID=381293

re: Generational GC (Garbage Collector) - A post-it analogy

nc — Tue, 26 Feb 2008 22:10:39 GMT

Link to PPT is corrupted - remove a period at the end or url.

re: Generational GC (Garbage Collector) - A post-it analogy

nativecpp — Tue, 26 Feb 2008 23:53:33 GMT

I personally thought it is better than the restaurant analogy because we all at one point or another does post-it note :-))

re: Generational GC (Garbage Collector) - A post-it analogy

Dirk — Wed, 27 Feb 2008 14:31:10 GMT

Ok so if there is One or more App domain per instance of the CLR, does that mean that there is one Managed heap?

Or is there one per App Domain?

Loved the post-it analogy by the way :D

re: Generational GC (Garbage Collector) - A post-it analogy

Tess — Wed, 27 Feb 2008 14:48:21 GMT

The GC and its heaps are common to the whole process so they are common to all appdomains in a given process.

There may be multiple heaps though, if you run the server GC there will be one regular .net GC heap per logical processor and one large object heap per processor. Each heap can have one or more heap segments.

You will run the server gc on multiproc boxes in processes that host the CLR such as asp.net for example. On single proc boxes or in services that don't host the CLR (winforms apps, windows services etc.) you will run the workstation GC and in that case there is only one regular and one large object heap.

You can also choose to run the server gc in winforms apps and windows services by setting <gcServer enabled="true" /> in the config file. Check out the GC popquiz if i want to know more about this

http://blogs.msdn.com/tess/archive/2007/04/10/net-garbage-collector-popquiz-followup.aspx

Glad you guys liked the post-it analogy btw:)

How does the GC work and what are the sizes of the different generations?

If broken it is, fix it you should — Thu, 17 Apr 2008 15:14:25 GMT

During our ASP.NET debugging chat there were many questions around the GC and the different generations.

.NET Memory Leak reader email: Are you really “leaking” .net memory

If broken it is, fix it you should — Fri, 27 Feb 2009 15:16:59 GMT

I get several emails every week through the blog asking for help on various issues.  Unfortunately