Solr/Lucene keeps eating up memory while idling
I'm curious why this is occurring and whether i can prevent it. This is my scenario: Locally I have an idle running solr 1.3 service using lucene 2.4.1 which has an index of ~330K documents containing ~10 fields each(total size ~12GB). Currently I've turned off all caching, lazy field loading, however i do have facet fields set for some request handlers. What i'm seeing is heap space usage increasing by ~1.2MB per 2 sec (by java.lang.String objects). I'm assuming they're being used by lucene but i may be wrong about that, since i have no actual data to confirm it. Why exactly is this happening, considering no requests are being serviced? Shouldn't the memory usage stabilise with a certain set of information and only be affected on requests? Additionally there is a full GC every half hour, which seems very unreasonable on a machine that isn't actually being used as a service. I really hope there's just a certain setting that i've overlooked, or a concept i'm not understanding because otherwise this behaviour seems very unreasonable... Thanks beforehand, Tony -- View this message in context: http://www.nabble.com/Solr-Lucene-keeps-eating-up-memory-while-idling-tp25894357p25894357.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: Solr/Lucene keeps eating up memory while idling
>Did I read that right? 330K docs == 12 GB index.
Ops, missed the dot - 1.2GB, but i don't think that should really make the
difference in this case. Even if it was 12 GB it would just have some really
juicy documents, right? :)
>Can you share the Solr logs and/or your config? Is this happening
>around a commit or some warming process? After startup, with no
>requests hitting it and no warming/commits/indexing, I don't see why
>it would be growing. Do you have custom code?
There is custom code around the solrj API however it does not explain this
behaviour because of the lack of requests coming through it. There are no
indexing, commits or queries sent to the server after it's started up,
except for the initial 2 warming queries (can those be to blame for this
even with no caches present??). Here are these in the log (it's on it's
default verbosity so i'll refrain from posting the whole start up until
necessary) After the initial start up, what you see in the log is GC every
2.5 min and Full GC every 30min. No actual activity is present.
Oct 15, 2009 1:13:36 PM org.apache.solr.core.SolrCore execute
INFO: [] webapp=null path=null params={start=0&q=fast_warm&rows=10} hits=0
status=0 QTime=16853
Oct 15, 2009 1:13:36 PM org.apache.solr.core.QuerySenderListener newSearcher
INFO: QuerySenderListener done.
Oct 15, 2009 1:13:36 PM org.apache.solr.core.SolrCore execute
INFO: [] webapp=null path=null
params={q=static+firstSearcher+warming+query+from+solrconfig.xml} hits=0
status=0 QTime=204
Oct 15, 2009 1:13:36 PM org.apache.solr.core.QuerySenderListener newSearcher
INFO: QuerySenderListener done
here is the config on it:
${solr.abortOnConfigurationError:true}
/r9/flare1.data/solr/data
false
10
32
2147483647
1
1000
1
single
false
32
10
2147483647
1
false
1024
50
200
solr 0 10
rocks 0 10
static newSearcher warming query from
solrconfig.xml
fast_warm 0 10
static firstSearcher warming query from
solrconfig.xml
false
2
explicit
dismax
explicit
0.01
text^0.5 address_t^2.0 name^1.5 brand^1.1 airport_name_t^1.0
text^0.2 address_t^1.1 name^1.5 brand^1.4 brand_exact^1.9
airport_name_t^1.0
id,name,price,score
100
*:*
text features name
0
name
regex
true
true
true
5
spellcheck
dismax
explicit
text^0.5 features^1.0 name^1.2 id^10.0
2<-1 5<-2 6<90%
incubationdate_dt:[* TO NOW/DAY-1MONTH]^2.2
inStock:true
lat
lng
9
17
lat
lng
textSpell
default
spell
./spellchecker1
jarowinkler
spell
org.apache.lucene.search.spell.JaroWinklerDistance
./spellchecker2
false
false
1
spellcheck
string
elevate.xml
explicit
elevator
standard
solrpingquery
all
explicit
true
100
70
0.5
[-\w ,/\n\"']{20,200}
5
solr
--
View this message in context:
http://www.nabble.com/Solr-Lucene-keeps-eating-up-memory-while-idling-tp25894357p25912727.html
Sent from the Solr - User mailing list archive at Nabble.com.
Re: Solr/Lucene keeps eating up memory while idling
Here is exactly half an hour from roughly the beginning of logging. There's nothing to see really because no requests are sent, you just see the GC behaviour: [Full GC 211987K->208493K(432448K), 0.6273480 secs] [GC 276333K->212269K(438720K), 0.0929710 secs] [GC 289133K->216269K(439936K), 0.1019780 secs] [GC 293133K->220205K(436672K), 0.1128410 secs] [GC 304301K->224429K(441472K), 0.1358250 secs] [GC 308525K->228685K(431744K), 0.1559950 secs] [GC 317197K->233069K(437312K), 0.1642160 secs] [GC 321581K->237613K(432832K), 0.1772830 secs] [GC 329197K->242093K(435136K), 0.1896270 secs] [GC 333677K->246701K(436352K), 0.2039880 secs] [GC 274165K->247917K(437760K), 0.2022640 secs] [Full GC 247917K->208726K(437760K), 0.7195200 secs] The heap is set to 1400m so it'll take it awhile to hit the roof. I also haven't tested to see if it stabilises but i'll leave it running now and see what happens to it overnight. I assume that when(if) it reaches the heap limit i'll just do full GCs more often. Grant Ingersoll-6 wrote: > > Please send a log covering at least the 2.5 minutes you discuss, but > upwards of 5 minutes would be good. > -- View this message in context: http://www.nabble.com/Solr-Lucene-keeps-eating-up-memory-while-idling-tp25894357p25916348.html Sent from the Solr - User mailing list archive at Nabble.com.
Analysis tool vs search query
Hi, I've run into this issue that I have no way of resolving, since the analysis tool doesn't show me there is an error. I copy the exact field value into the analysis tool and i type in the exact query request i'm issuing and the tool finds it a match. However running the query with that exact same request doesn't return the item. I know the item is there, since I can find it based on another field. It appears that the problem occurs when i add a second word in my query. So I also tried replacing all whitespaces with _, just to make sure that there's a mismatch there but there isn't. Here is my field type definition in case i'm missing something Thanks, Tony Example inputs for analysis: Index value: Banana, Veggie Query value: banana veggie -- View this message in context: http://old.nabble.com/Analysis-tool-vs-search-query-tp27316047p27316047.html Sent from the Solr - User mailing list archive at Nabble.com.
