RE: Is JCS slow ?
I have found ! In LRUMemoryCache.java, in the verifyCache() method, for an unknown reson, isDebugEnabled() is returning true. So, each time i call get() this method is call and is verifying every element in the cache ... By modifying verifyCache (if (true) return;) I have improved the speed as fast as the hashtable. Does anyone know what can enabled the debug mode ? Or if it is possible to force the debug mode to false ? Thanks. JMS. -Original Message- From: Spaggiari, Jean-Marc [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 20, 2004 6:51 PM To: '[EMAIL PROTECTED]' Subject: Re: Is JCS slow ? Running the same test as standalone in a main : Avant le test Tue Jan 20 18:47:30 EST 2004 Tue Jan 20 18:47:30 EST 2004 Tue Jan 20 18:47:30 EST 2004 Apres le test :((( Now it's sure, it come from JBoss, but why and where ? :( - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Is JCS slow ?
Hi all. Sorry if it's a question that you have always see, but i'm not able to look at the archives ... I'm using JCS in an application where i need to look 1600 time on the cache in a loop. The cache is empty at this time. For loop take about 160 seconds. Using hashtable instead of JCS take about 1s ... Where is my mistake ? Because I think I have do a mistake. It's not posible that JCS was 160 time slower than a Hashable ... An running JCS in a servlet on JBoss. Is it posible it come from here ? Thanks for your help. JMS. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Is JCS slow ?
but DC is not used in my cache.cff file ... It's only here for remind, but I
have jxs.default= with nothing else ...
I'm applying the Aaron suggestion ... Wait a minute for the result ...
-Original Message-
From: James Taylor [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 20, 2004 4:02 PM
To: Turbine JCS Users List
Subject: Re: Is JCS slow ?
It looks like your memory caches are bounded at 1000 items (MaxObjects
= 1000). Thus if you put 1600 items in the cache, and then look for any
of the first 600 items, the cache will need to read them from disk,
which takes time.
On Jan 20, 2004, at 3:14 PM, Spaggiari, Jean-Marc wrote:
I am caching String (key) for Vector (value) ...
But I found somethings. Y have a disk cache. By disable it, I can
improved
my speed when cache is empty. But if I fill cache with 1600 items, it
take
about 1 min for looking for 100 items inside :(
Here is my cache.cff file, the code follow ...
I'm trying with Hashtable, but I really don't like it :(
# DEFAULT CACHE REGION
jcs.default=
jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttribu
tes
jcs.default.cacheattributes.MaxObjects=1000
jcs.default.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memor
y.lru
.LRUMemoryCache
# System CACHE REGION
jcs.system.groupIdCache=
jcs.system.groupIdCache.cacheattributes=org.apache.jcs.engine.Composite
Cache
Attributes
jcs.system.groupIdCache.cacheattributes.MaxObjects=1
jcs.system.groupIdCache.cacheattributes.MemoryCacheName=org.apache.jcs.
engin
e.memory.lru.LRUMemoryCache
# PRE-DEFINED CACHE REGIONS
jcs.region.testCache1=
jcs.region.testCache1.cacheattributes=org.apache.jcs.engine.CompositeCa
cheAt
tributes
jcs.region.testCache1.cacheattributes.MaxObjects=1000
jcs.region.testCache1.cacheattributes.MemoryCacheName=org.apache.jcs.en
gine.
memory.lru.LRUMemoryCache
jcs.region.testCache1.cacheattributes.UseMemoryShrinker=true
jcs.region.testCache1.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.region.testCache1.cacheattributes.ShrinkerIntervalSeconds=60
jcs.region.HandlerDonnees=
jcs.region.HandlerDonnees.cacheattributes=org.apache.jcs.engine.Composi
teCac
heAttributes
jcs.region.HandlerDonnees.cacheattributes.MaxObjects=1000
jcs.region.HandlerDonnees.cacheattributes.MemoryCacheName=org.apache.jc
s.eng
ine.memory.lru.LRUMemoryCache
jcs.region.HandlerDonnees.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.region.HandlerDonnees.cacheattributes.ShrinkerIntervalSeconds=60
# AVAILABLE AUXILIARY CACHES
jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCache
Facto
ry
jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.Index
edDis
kCacheAttributes
jcs.auxiliary.DC.attributes.DiskPath=/tmp
Initialisation in constructor ... (Handler is different than
HandlerDonnees)
private Handler()
{
try
{
//cache = JCS.getInstance(Handler);
hashCache = new Hashtable ();
}
catch (Exception e)
{
// Handle cache region initialization failure
e.printStackTrace();
}
}
Reading the cache :
Vector enCache = new Vector ();
Vector aTraiter = new Vector ();
try
{
System.out.println (new Date ());
for (int indexMot = 0; indexMot mots.size(); indexMot++)
{
if (indexMot % 100 == 0)
System.out.println (indexMot + = + new
Date
());
String mot = (String) mots.elementAt(indexMot);
Vector liste = (Vector) hashCache.get(mot + suffix);
if (liste == null)
aTraiter.addElement (mot);
else
enCache.addElement (mot);
}
System.out.println (new Date ());
}
catch (Exception e)
{
e.printStackTrace();
}
Writing in cache :
try
{
hashCache.put(motATraiter + suffix,
result.elementAt(indexATraiter));
}
catch (Exception e)
{
e.printStackTrace();
}
-Original Message-
From: Aaron Smuts [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 20, 2004 3:07 PM
To: 'Turbine JCS Users List'
Subject: RE: Is JCS slow ?
No, no one has ever asked if JCS is slow. Something is definitely
wrong. The cache is not significantly slower than a hashtable. Can
you
give more details about your configuration (i.e. the cache.ccf file)
and
what you are caching.
-Original Message-
From: Spaggiari, Jean-Marc [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 20, 2004 1:18 PM
To: '[EMAIL PROTECTED]'
Subject: Is JCS slow ?
Hi all
RE: Is JCS slow ?
Date ()); You should use the system
currenttimemillis.
Alos, you might want to use an ArrayList rather than a vector here.
That's irrelevant though.
You are getting an instance of a region that doesn't exit. You don't
have a region called handler, so it will return a new region using the
default settings.
Get a region that you have defined in the cache.ccf, not just the
default, and then try two things. Set the usememoryshrinker to false.
See if this helps. Then try increasing the maxobjects to a number
greater that you are using. Test again. I just want to diagnose the
problem. You might also try not setting the maxideltime.
When you were using the diskcahe, were any files created?
Aaron
-Original Message-
From: Spaggiari, Jean-Marc [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 20, 2004 2:14 PM
To: 'Turbine JCS Users List'
Subject: RE: Is JCS slow ?
I am caching String (key) for Vector (value) ...
But I found somethings. Y have a disk cache. By disable it, I can
improved
my speed when cache is empty. But if I fill cache with 1600 items, it
take
about 1 min for looking for 100 items inside :(
Here is my cache.cff file, the code follow ...
I'm trying with Hashtable, but I really don't like it :(
# DEFAULT CACHE REGION
jcs.default=
jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttribut
es
jcs.default.cacheattributes.MaxObjects=1000
jcs.default.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory
.l
ru
.LRUMemoryCache
# System CACHE REGION
jcs.system.groupIdCache=
jcs.system.groupIdCache.cacheattributes=org.apache.jcs.engine.CompositeC
ac
he
Attributes
jcs.system.groupIdCache.cacheattributes.MaxObjects=1
jcs.system.groupIdCache.cacheattributes.MemoryCacheName=org.apache.jcs.e
ng
in
e.memory.lru.LRUMemoryCache
# PRE-DEFINED CACHE REGIONS
jcs.region.testCache1=
jcs.region.testCache1.cacheattributes=org.apache.jcs.engine.CompositeCac
he
At
tributes
jcs.region.testCache1.cacheattributes.MaxObjects=1000
jcs.region.testCache1.cacheattributes.MemoryCacheName=org.apache.jcs.eng
in
e.
memory.lru.LRUMemoryCache
jcs.region.testCache1.cacheattributes.UseMemoryShrinker=true
jcs.region.testCache1.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.region.testCache1.cacheattributes.ShrinkerIntervalSeconds=60
jcs.region.HandlerDonnees=
jcs.region.HandlerDonnees.cacheattributes=org.apache.jcs.engine.Composit
eC
ac
heAttributes
jcs.region.HandlerDonnees.cacheattributes.MaxObjects=1000
jcs.region.HandlerDonnees.cacheattributes.MemoryCacheName=org.apache.jcs
.e
ng
ine.memory.lru.LRUMemoryCache
jcs.region.HandlerDonnees.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.region.HandlerDonnees.cacheattributes.ShrinkerIntervalSeconds=60
# AVAILABLE AUXILIARY CACHES
jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheF
ac
to
ry
jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.Indexe
dD
is
kCacheAttributes
jcs.auxiliary.DC.attributes.DiskPath=/tmp
Initialisation in constructor ... (Handler is different than
HandlerDonnees)
private Handler()
{
try
{
//cache = JCS.getInstance(Handler);
hashCache = new Hashtable ();
}
catch (Exception e)
{
// Handle cache region initialization failure
e.printStackTrace();
}
}
Reading the cache :
Vector enCache = new Vector ();
Vector aTraiter = new Vector ();
try
{
System.out.println (new Date ());
for (int indexMot = 0; indexMot mots.size(); indexMot++)
{
if (indexMot % 100 == 0)
System.out.println (indexMot + = + new
Date
());
String mot = (String) mots.elementAt(indexMot);
Vector liste = (Vector) hashCache.get(mot + suffix);
if (liste == null)
aTraiter.addElement (mot);
else
enCache.addElement (mot);
}
System.out.println (new Date ());
}
catch (Exception e)
{
e.printStackTrace();
}
Writing in cache :
try
{
hashCache.put(motATraiter + suffix,
result.elementAt(indexATraiter));
}
catch (Exception e)
{
e.printStackTrace();
}
-Original Message-
From: Aaron Smuts [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 20, 2004 3:07 PM
To: 'Turbine JCS Users List'
Subject: RE: Is JCS slow ?
No, no one has ever asked if JCS is slow. Something is definitely
wrong. The cache is not significantly slower than a hashtable. Can
you
give more details about your
Re: Is JCS slow ?
Running the same test as standalone in a main : Avant le test Tue Jan 20 18:47:30 EST 2004 Tue Jan 20 18:47:30 EST 2004 Tue Jan 20 18:47:30 EST 2004 Apres le test :((( Now it's sure, it come from JBoss, but why and where ? :( - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
