Jas does the cached entries expire at some point? I assume this would be
another configuration option...
-Ryan
Email: rjbax...@us.ibm.com
Phone: 978-899-3041
developerWorks Profile
From: ๏̯͡๏ Jasvir Nagra <jas...@google.com>
To: dev@shindig.apache.org,
Date: 10/19/2011 07:40 PM
Subject: Re: Memory concerns: what is the "normal" amount of
CssTree.RuleSet objects to see at runtime
A css rule-set is what just a css selector (or more accurately, one or
more
css selectors) and a block of css declarations. Eg:
div { background-color: red; color: pink; }
is a rule-set. It depends on what you're parsing - typically, a
stylesheet,
webpage or gadget will have tens of rules and if you're caching across
multiple such pages, this number can grow quickly. Presumably, you'd
adjust
the EhCache capacity if these objects were overwhelming the cache.
On Wed, Oct 19, 2011 at 12:53 PM, Stanton Sievers
<ssiev...@us.ibm.com>wrote:
> Thanks Jas.
>
> The parsed css cache is the one I was referring to. EhCache is the
cache
> provider in this case, so that's probably why I was seeing EhCache
> references to the Caja objects in the Eclipse MAT.
>
> I'll disable it and see what I can find. In the meantime, would 1700 of
> these RuleSets seem reasonable for a Shindig server? Or is there no way
> to tell? ~1700 just seems like a lot, but I'm in no way an expert on
what
> those RuleSets are used for. :)
>
> Thanks,
> -Stanton
>
>
>
> From: ๏̯͡๏ Jasvir Nagra <jas...@google.com>
> To: dev@shindig.apache.org,
> Date: 10/19/2011 15:06
> Subject: Re: Memory concerns: what is the "normal" amount of
> CssTree.RuleSet objects to see at runtime
>
>
>
> And he hangs out here. :)
>
> As you'd expect, CssTree.RuleSets (and all the other parse tree nodes)
are
> retained as long as the root of the parse tree is retained. Nothing in
> the
> Caja parser retains a reference to the root of the parse tree after the
> parse. In
> Shindig,
>
>
shindig/java/gadgets/src/main/java/org/apache/shindig/gadgets/parse/caja/CajaCssParser.java
> has a parsed css cache - is that the cache you're referring to?
>
> A quick check to test this would be to turn that off that cache and see
if
> you still see a lot of CssTree.Rulesets retained.
>
> jas
>
>
> On Wed, Oct 19, 2011 at 11:48 AM, Ryan J Baxter <rjbax...@us.ibm.com>
> wrote:
>
> > You want to ask Jasvir, he is the Caja lead at Google :)
> >
> > -Ryan
> >
> > Email: rjbax...@us.ibm.com
> > Phone: 978-899-3041
> > developerWorks Profile
> >
> >
> >
> > From: Stanton Sievers/Westford/IBM@Lotus
> > To: dev@shindig.apache.org,
> > Date: 10/19/2011 02:21 PM
> > Subject: Memory concerns: what is the "normal" amount of
> > CssTree.RuleSet objects to see at runtime
> >
> >
> >
> > Hi everyone,
> >
> > I'm seeing a lot of com.google.caja.parser.css.CssTree$RuleSet objects
> > when running Shindig. I'm seeing around 1700 of these RuleSet objects
> > being retained, which equates to between 9MB and 10MB. This
constitutes
> > ~15% of the total heap size! These RuleSets appear to be in an
> ArrayList
> > that is referenced by com.google.caja.parser.ChildNodes (at least
> > according to Eclipse Memory Analyzer).
> >
> > Is this normal? Is it possible EhCache is hanging onto a bunch of
these
> > objects?
> >
> > I want to get everyone's opinion here before I post something to the
> Caja
> > folks.
> >
> > Thanks,
> > -Stanton
> >
> >
> >
> >
> >
>
>
>
>
