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<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m actively trying to replace memcached with
Infinispan with the memcached server. Swapping it in with my existing whalin
client was very simple, I just had to disable the binary protocol. The problem
I’m facing is that evictions based on maxEntries aren’t working.
Here’s the configuration I’m using (btw, I’ve tried playing
with all the parameters by trying different strategies, using DEFAULT
threadPolicy, change wakeUpInterval, and maxEntries by powers of 2.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><infinispan><o:p></o:p></p>
<p class=MsoNormal> <global><o:p></o:p></p>
<p class=MsoNormal>
<globalJmxStatistics enabled="true"/><o:p></o:p></p>
<p class=MsoNormal> </global><o:p></o:p></p>
<p class=MsoNormal> <default><o:p></o:p></p>
<p class=MsoNormal>
<jmxStatistics enabled="true"/><o:p></o:p></p>
<p class=MsoNormal>
<eviction wakeUpInterval="500" maxEntries="1024" strategy="LIRS"
threadPolicy="PIGGYBACK"/><o:p></o:p></p>
<p class=MsoNormal>
<expiration maxIdle="3600000" lifespan="-1"/><o:p></o:p></p>
<p class=MsoNormal> </default><o:p></o:p></p>
<p class=MsoNormal></infinispan><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Infinispan will remove entries that are expired, but it
doesn’t seem to evict any items when the cache exceeds the number of
maxEntries. I’ve enabled trace and using JMX to peer into the number of
entries, and I easily exceed the maxEntries by running a junit test loading it
with 10,000 entries. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I noticed in the DefaultDataContainer it only handles
immortalEntries with the bounded concurrency map. Is the memcached server
somehow only setting items as mortal entries? If so, this means that the behavior
for this memcached is really deficient, since you’re bound by memory and
can’t LRU once maxEntries is reached. The only saving grace are the
expiration settings. Is there a suggestion on how I can fix this so I can have
the behavior of LRU with eviction? <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks, <o:p></o:p></p>
<p class=MsoNormal>Owen<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Code from DefaultDataContainer…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>protected DefaultDataContainer(int concurrencyLevel, int
maxEntries, EvictionStrategy strategy, EvictionThreadPolicy policy) {<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> // translate eviction policy
and strategy<o:p></o:p></p>
<p class=MsoNormal> switch (policy) {<o:p></o:p></p>
<p class=MsoNormal> case
PIGGYBACK:<o:p></o:p></p>
<p class=MsoNormal> case
DEFAULT:<o:p></o:p></p>
<p class=MsoNormal> evictionListener
= new DefaultEvictionListener();<o:p></o:p></p>
<p class=MsoNormal>
break;<o:p></o:p></p>
<p class=MsoNormal> default:<o:p></o:p></p>
<p class=MsoNormal>
throw new IllegalArgumentException("No such eviction thread policy "
+ strategy);<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> Eviction eviction;<o:p></o:p></p>
<p class=MsoNormal> switch (strategy) {<o:p></o:p></p>
<p class=MsoNormal> case FIFO:<o:p></o:p></p>
<p class=MsoNormal> case
UNORDERED:<o:p></o:p></p>
<p class=MsoNormal> case LRU:<o:p></o:p></p>
<p class=MsoNormal>
eviction = Eviction.LRU;<o:p></o:p></p>
<p class=MsoNormal>
break;<o:p></o:p></p>
<p class=MsoNormal> case LIRS:<o:p></o:p></p>
<p class=MsoNormal>
eviction = Eviction.LIRS;<o:p></o:p></p>
<p class=MsoNormal>
break;<o:p></o:p></p>
<p class=MsoNormal> default:<o:p></o:p></p>
<p class=MsoNormal>
throw new IllegalArgumentException("No such eviction strategy " +
strategy);<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal> immortalEntries = new
BoundedConcurrentHashMap<Object, InternalCacheEntry>(maxEntries,
concurrencyLevel, eviction, evictionListener);<o:p></o:p></p>
<p class=MsoNormal> mortalEntries = new
ConcurrentHashMap<Object, InternalCacheEntry>(64, 0.75f,
concurrencyLevel);<o:p></o:p></p>
<p class=MsoNormal> entryFactory = new
InternalEntryFactory();<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#999999'>_______________________________________________________</span></b><span
style='font-size:6.0pt;font-family:"Arial","sans-serif";color:#999999'> <br>
</span><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#999999'>Owen Tran </span></b><span style='font-size:8.0pt;font-family:
"Arial","sans-serif";color:#6DB43F'>||</span><span style='font-size:6.0pt;
font-family:"Arial","sans-serif";color:#999999'> </span><b><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#999999'>VP,
Engineering </span></b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#6DB43F'>||</span><span style='font-size:6.0pt;font-family:"Arial","sans-serif";
color:#999999'> </span><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#999999'>ezRez Software, Inc.</span></b><span style='font-size:6.0pt;
font-family:"Arial","sans-serif";color:#999999'> <br>
<br>
</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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