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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Lucene search/count performance abrupt degradation (MMapDirectory)
Date Thu, 08 Jan 2015 15:33:17 GMT
Thanks for closing this off.

On Thu, Jan 8, 2015 at 7:21 AM, Piotr Idzikowski
<piotridzikowski@gmail.com> wrote:
> We have detected the problem: the excessive(!) amount of memory allocated
> to Java heap. This articles helped us find the issue:
>
> http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html
>
> Although the article suggests the minimum-possible memory approach as a
> mere recommendation, too much RAM memory assigned to Java heap actually
> proved to be lethal to Lucene's IO operations, drowned by the swapping
> overload (indicated by the iotop tool after the search/count performance
> degradation kicked in) with all the effects described in the original post.
>
> Decreasing from the maximum Java heap from 26G (with ~10G actually used and
> up to 21G getting allocated before garbage collector was run) to 16G solved
> all the problems and brought back the stability to our systems.
>
> We would suggest highlighting the possibility of such disastrous
> side-effect of Java memory configuration in Lucene installation manuals. It
> is quite interesting that the article refrains from using the word "bug"
> (be it of Lucene, Java or OS origin), while in our opinion it is the most
> accurate term for this rather bizarre case.
>
> Regards
> Piotr
>
> On Tue, Dec 23, 2014 at 9:32 PM, Piotr Idzikowski <piotridzikowski@gmail.com
>> wrote:
>
>> Hello.
>>
>> I have a performance problem with Lucene search queries running on Java
>> 7u71 Linux platform. I use the newest 4.10 version, but we also experience
>> the same problem with Lucene 4.7.2.
>>
>> I observed that after some time (1 or 2 days), even without any heavy use,
>> Lucene search and count slow down abruptly, from 1-2 seconds to 30-40,
>> without any intermediate steps and regardless of type of filters/terms used
>> (or not). No index writing downgrade has been observed.
>>
>> Analysing jstack results I can see some threads get stuck in exactly the
>> same place, depending on the Lucene version, most probably due to certain
>> rearrangements in the index structure for the 4.10 version
>> (NumericDocValuesField for select fields):
>>
>>
>> --- In Lucene 4.10:
>>
>> Thread 4043: (state = IN_JAVA)
>>
>>  - java.nio.DirectByteBuffer.getInt(int) @bci=5, line=675 (Interpreted
>> frame)
>>  -
>> org.apache.lucene.store.ByteBufferIndexInput$SingleBufferImpl.readInt(long)
>> @bci=6, line=480 (Interpreted frame)
>>  -
>> org.apache.lucene.util.packed.DirectReader$DirectPackedReader28.get(long)
>> @bci=23, line=222 (Interpreted frame)
>>  -
>> org.apache.lucene.codecs.lucene410.Lucene410DocValuesProducer$2.get(long)
>> @bci=13, line=369 (Interpreted frame)
>>  - org.apache.lucene.util.LongValues.get(int) @bci=3, line=45 (Interpreted
>> frame)
>>  - org.apache.lucene.search.FieldCacheImpl$7.get(int) @bci=5, line=929
>> (Compiled frame)
>>  - org.apache.lucene.search.FieldCacheRangeFilter$6$1.matchDoc(int)
>> @bci=5, line=397 (Compiled frame)
>>  - org.apache.lucene.search.FieldCacheDocIdSet$3.nextDoc() @bci=40,
>> line=92 (Compiled frame)
>>  -
>> org.apache.lucene.util.FixedBitSet.or(org.apache.lucene.search.DocIdSetIterator)
>> @bci=89, line=342 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.initialResult(org.apache.lucene.index.AtomicReaderContext,
>> int, int[]) @bci=40, line=134 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.getDocIdSet(org.apache.lucene.index.AtomicReaderContext,
>> int, int[]) @bci=4, line=153 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.getDocIdSet(org.apache.lucene.index.AtomicReaderContext,
>> org.apache.lucene.util.Bits) @bci=23, line=105 (Interpreted frame)
>>  -
>> org.apache.lucene.search.FilteredQuery$1.bulkScorer(org.apache.lucene.index.AtomicReaderContext,
>> boolean, org.apache.lucene.util.Bits) @bci=33, line=144 (Compiled frame)
>>  - org.apache.lucene.search.IndexSearcher.search(java.util.List,
>> org.apache.lucene.search.Weight, org.apache.lucene.search.Collector)
>> @bci=67, line=618 (Compiled frame)
>>
>>
>>
>> --- In Lucene 4.7:
>>
>> Thread 9481: (state = IN_JAVA)
>>
>>  - org.apache.lucene.search.FieldCacheImpl$LongsFromArray.get(int) @bci=9,
>> line=915 (Compiled frame; information may be imprecise)
>>  - org.apache.lucene.search.FieldCacheRangeFilter$6$1.matchDoc(int)
>> @bci=5, line=397 (Compiled frame)
>>  - org.apache.lucene.search.FieldCacheDocIdSet$3.nextDoc() @bci=40,
>> line=101 (Compiled frame)
>>  -
>> org.apache.lucene.util.FixedBitSet.or(org.apache.lucene.search.DocIdSetIterator)
>> @bci=89, line=343 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.initialResult(org.apache.lucene.index.AtomicReaderContext,
>> int, int[]) @bci=40, line=134 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.getDocIdSet(org.apache.lucene.index.AtomicReaderContext,
>> int, int[]) @bci=4, line=153 (Compiled frame)
>>  -
>> org.apache.lucene.queries.ChainedFilter.getDocIdSet(org.apache.lucene.index.AtomicReaderContext,
>> org.apache.lucene.util.Bits) @bci=23, line=105 (Compiled frame)
>>  -
>> org.apache.lucene.search.FilteredQuery$1.scorer(org.apache.lucene.index.AtomicReaderContext,
>> boolean, boolean, org.apache.lucene.util.Bits) @bci=34, line=130 (Compiled
>> frame)
>>  - org.apache.lucene.search.IndexSearcher.search(java.util.List,
>> org.apache.lucene.search.Weight, org.apache.lucene.search.Collector)
>> @bci=68, line=618 (Compiled frame)
>>  -
>> org.apache.lucene.search.IndexSearcher.search(org.apache.lucene.search.Query,
>> org.apache.lucene.search.Filter, org.apache.lucene.search.Collector)
>> @bci=16, line=297 (Interpreted frame)
>>
>>
>>
>> The most puzzling thing is that this immediate degradation happens only on
>> the biggest machines, with the highest number of processors and RAM
>> available (and assigned). Interestingly smaller machines (in number of
>> cores and RAM), with indexes of bigger or smaller size do not display any
>> degradation.
>>
>> The whole application is run on Glassfish 3.1.2 server and any attempt to
>> close MMapDirectory and readers (through SearcherManager), or simply
>> undeploy/deploy the application, or stopping index writer process does not
>> change the declined performance state. Only the full Glassfish/JVM restart
>> brings back the original speed, alas for a day or two only.
>>
>> Here is some additional information of the affected set-up with Lucene
>> 4.10 (vs some issue-free instances):
>>
>>
>> 1. Index folder size: 18G (vs 6G or 21G on issue-free servers)
>>
>>
>> 2. JVM's Xmx & Xms set to 26G (vs 16G or 7G! on issue-free server)
>>
>> NOTE: the actual consumption of Java heap never surpasses 10G anywhere
>>
>>
>> 3. Hardware:
>>
>>     DELL PowerEdge R820, 256G RAM, 32 CPUs Intel Xeon E5-4640 2.4GHz
>> 300GB SFF 15K RPM (6 Gb/s) Drive, HDD RPM: 15000.  RAID 1 hardware,
>> ext3/ext4 filesystem on LVM
>>
>> vs issue-free
>>
>>     DELL PowerEdge R720, 128G RAM, 16 CPUs Intel Xeon E5-2680 2.7GHz
>> 300GB SFF 15K RPM (6 Gb/s) Drive, HDD RPM: 15000.  RAID 1 hardware, ext3
>> filesystem on LVM
>>
>>
>> 4. OS:
>>
>>   Red Hat Enterprise Linux Server release 6.6 (Santiago) # This is a "SLES
>> Expanded Support platform release 6.6"
>>
>>   Red Hat Enterprise Linux Server release 5.11 (Tikanga)
>>
>>
>> NOTES:
>>
>>  - both peformance issue and issue-free behaviour has been observed on
>> either of these platforms
>>  - each instance has a mySQL database (InnoDB engine) running with no
>> performance issues detected
>>
>>
>> 5. vm.max_map_count = 65530
>>    vm.swappiness = 0
>>
>>
>> 6. ulimit -m = unlimited
>>    ulimit -l = 64
>>    ulimit -v = unlimited
>>    ulimit -n = 65535
>>
>>
>> Index folder details with the performance issue instance (reindexed 22th
>> Dec 2014):
>>
>> -rw-r--r-- 1 glassfish glassfish       8603 Dec 23 13:43 _3nr_27.del
>> -rw-r--r-- 1 glassfish glassfish  500359541 Dec 22 16:11 _3nr.fdt
>> -rw-r--r-- 1 glassfish glassfish     315153 Dec 22 16:11 _3nr.fdx
>> -rw-r--r-- 1 glassfish glassfish       2342 Dec 22 16:14 _3nr.fnm
>> -rw-r--r-- 1 glassfish glassfish  175275056 Dec 22 16:14
>> _3nr_Lucene410_0.dvd
>> -rw-r--r-- 1 glassfish glassfish        181 Dec 22 16:14
>> _3nr_Lucene410_0.dvm
>> -rw-r--r-- 1 glassfish glassfish 2188210769 Dec 22 16:14
>> _3nr_Lucene41_0.doc
>> -rw-r--r-- 1 glassfish glassfish 1548092715 Dec 22 16:14
>> _3nr_Lucene41_0.pos
>> -rw-r--r-- 1 glassfish glassfish  751436802 Dec 22 16:14
>> _3nr_Lucene41_0.tim
>> -rw-r--r-- 1 glassfish glassfish   13999667 Dec 22 16:14
>> _3nr_Lucene41_0.tip
>> -rw-r--r-- 1 glassfish glassfish  101475702 Dec 22 16:14 _3nr.nvd
>> -rw-r--r-- 1 glassfish glassfish        141 Dec 22 16:14 _3nr.nvm
>> -rw-r--r-- 1 glassfish glassfish        449 Dec 22 16:14 _3nr.si
>> -rw-r--r-- 1 glassfish glassfish       2644 Dec 23 13:43 _421_1x.del
>> -rw-r--r-- 1 glassfish glassfish  121455459 Dec 22 16:33 _421.fdt
>> -rw-r--r-- 1 glassfish glassfish      71727 Dec 22 16:33 _421.fdx
>> -rw-r--r-- 1 glassfish glassfish       2342 Dec 22 16:34 _421.fnm
>> -rw-r--r-- 1 glassfish glassfish   36762556 Dec 22 16:34
>> _421_Lucene410_0.dvd
>> -rw-r--r-- 1 glassfish glassfish        181 Dec 22 16:34
>> _421_Lucene410_0.dvm
>> -rw-r--r-- 1 glassfish glassfish  389067295 Dec 22 16:34
>> _421_Lucene41_0.doc
>> -rw-r--r-- 1 glassfish glassfish  217957881 Dec 22 16:34
>> _421_Lucene41_0.pos
>> -rw-r--r-- 1 glassfish glassfish  206031060 Dec 22 16:34
>> _421_Lucene41_0.tim
>> -rw-r--r-- 1 glassfish glassfish    4223546 Dec 22 16:34
>> _421_Lucene41_0.tip
>> -rw-r--r-- 1 glassfish glassfish   21625858 Dec 22 16:34 _421.nvd
>> -rw-r--r-- 1 glassfish glassfish        141 Dec 22 16:34 _421.nvm
>> -rw-r--r-- 1 glassfish glassfish        450 Dec 22 16:34 _421.si
>> -rw-r--r-- 1 glassfish glassfish      14947 Dec 23 13:43 _7wu_3u.del
>> -rw-r--r-- 1 glassfish glassfish  597109930 Dec 22 20:19 _7wu.fdt
>> -rw-r--r-- 1 glassfish glassfish     355197 Dec 22 20:19 _7wu.fdx
>> -rw-r--r-- 1 glassfish glassfish       2342 Dec 22 20:23 _7wu.fnm
>> -rw-r--r-- 1 glassfish glassfish  194040056 Dec 22 20:23
>> _7wu_Lucene410_0.dvd
>> -rw-r--r-- 1 glassfish glassfish        181 Dec 22 20:23
>> _7wu_Lucene410_0.dvm
>> -rw-r--r-- 1 glassfish glassfish 2211307090 Dec 22 20:23
>> _7wu_Lucene41_0.doc
>> -rw-r--r-- 1 glassfish glassfish 1212527515 Dec 22 20:23
>> _7wu_Lucene41_0.pos
>> -rw-r--r-- 1 glassfish glassfish  826659180 Dec 22 20:23
>> _7wu_Lucene41_0.tim
>> -rw-r--r-- 1 glassfish glassfish   16374356 Dec 22 20:23
>> _7wu_Lucene41_0.tip
>> -rw-r--r-- 1 glassfish glassfish  118580702 Dec 22 20:23 _7wu.nvd
>> -rw-r--r-- 1 glassfish glassfish        141 Dec 22 20:23 _7wu.nvm
>> -rw-r--r-- 1 glassfish glassfish        450 Dec 22 20:23 _7wu.si
>> -rw-r--r-- 1 glassfish glassfish        388 Dec 23 13:31 _ajv_1b.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 22:53 _ajv.cfe
>> -rw-r--r-- 1 glassfish glassfish  199163569 Dec 22 22:53 _ajv.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 22:53 _ajv.si
>> -rw-r--r-- 1 glassfish glassfish      10653 Dec 23 13:41 _amn_4j.del
>> -rw-r--r-- 1 glassfish glassfish  450510940 Dec 22 22:58 _amn.fdt
>> -rw-r--r-- 1 glassfish glassfish     272063 Dec 22 22:58 _amn.fdx
>> -rw-r--r-- 1 glassfish glassfish       2342 Dec 22 23:02 _amn.fnm
>> -rw-r--r-- 1 glassfish glassfish  147330056 Dec 22 23:02
>> _amn_Lucene410_0.dvd
>> -rw-r--r-- 1 glassfish glassfish        181 Dec 22 23:02
>> _amn_Lucene410_0.dvm
>> -rw-r--r-- 1 glassfish glassfish 2248610483 Dec 22 23:02
>> _amn_Lucene41_0.doc
>> -rw-r--r-- 1 glassfish glassfish 1609057525 Dec 22 23:02
>> _amn_Lucene41_0.pos
>> -rw-r--r-- 1 glassfish glassfish  713702544 Dec 22 23:02
>> _amn_Lucene41_0.tim
>> -rw-r--r-- 1 glassfish glassfish   14108217 Dec 22 23:02
>> _amn_Lucene41_0.tip
>> -rw-r--r-- 1 glassfish glassfish   90035702 Dec 22 23:02 _amn.nvd
>> -rw-r--r-- 1 glassfish glassfish        141 Dec 22 23:02 _amn.nvm
>> -rw-r--r-- 1 glassfish glassfish        449 Dec 22 23:02 _amn.si
>> -rw-r--r-- 1 glassfish glassfish        482 Dec 23 13:23 _aot_1v.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 23:02 _aot.cfe
>> -rw-r--r-- 1 glassfish glassfish  192102720 Dec 22 23:02 _aot.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 23:02 _aot.si
>> -rw-r--r-- 1 glassfish glassfish        421 Dec 23 13:31 _aq2_1q.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 23:03 _aq2.cfe
>> -rw-r--r-- 1 glassfish glassfish  255543219 Dec 22 23:03 _aq2.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 23:03 _aq2.si
>> -rw-r--r-- 1 glassfish glassfish       6296 Dec 23 13:09 _arg_1n.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 23:06 _arg.cfe
>> -rw-r--r-- 1 glassfish glassfish   22582413 Dec 22 23:06 _arg.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 23:06 _arg.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 23:32 _as0.cfe
>> -rw-r--r-- 1 glassfish glassfish    4887961 Dec 22 23:32 _as0.cfs
>> -rw-r--r-- 1 glassfish glassfish       1268 Dec 23 04:08 _as0_p.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 23:32 _as0.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 22 23:37 _asb.cfe
>> -rw-r--r-- 1 glassfish glassfish    8007352 Dec 22 23:37 _asb.cfs
>> -rw-r--r-- 1 glassfish glassfish       1596 Dec 23 13:01 _asb_o.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 22 23:37 _asb.si
>> -rw-r--r-- 1 glassfish glassfish        968 Dec 23 11:31 _atg_19.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 00:07 _atg.cfe
>> -rw-r--r-- 1 glassfish glassfish    4066236 Dec 23 00:07 _atg.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 00:07 _atg.si
>> -rw-r--r-- 1 glassfish glassfish        760 Dec 23 13:27 _atq_2f.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 00:13 _atq.cfe
>> -rw-r--r-- 1 glassfish glassfish  170864354 Dec 23 00:13 _atq.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 00:13 _atq.si
>> -rw-r--r-- 1 glassfish glassfish       1628 Dec 23 11:31 _b61_13.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 03:47 _b61.cfe
>> -rw-r--r-- 1 glassfish glassfish    5999917 Dec 23 03:47 _b61.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 03:47 _b61.si
>> -rw-r--r-- 1 glassfish glassfish       2426 Dec 23 11:31 _b9p_12.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 04:50 _b9p.cfe
>> -rw-r--r-- 1 glassfish glassfish   10325273 Dec 23 04:50 _b9p.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 04:50 _b9p.si
>> -rw-r--r-- 1 glassfish glassfish       7252 Dec 23 13:14 _bg3_1i.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 06:52 _bg3.cfe
>> -rw-r--r-- 1 glassfish glassfish   27333130 Dec 23 06:52 _bg3.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 06:52 _bg3.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 08:06 _bkb.cfe
>> -rw-r--r-- 1 glassfish glassfish    3124229 Dec 23 08:06 _bkb.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 08:06 _bkb.si
>> -rw-r--r-- 1 glassfish glassfish        917 Dec 23 13:02 _bkb_z.del
>> -rw-r--r-- 1 glassfish glassfish       1074 Dec 23 13:41 _bol_12.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 09:55 _bol.cfe
>> -rw-r--r-- 1 glassfish glassfish    4043642 Dec 23 09:55 _bol.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 09:55 _bol.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 10:54 _bry.cfe
>> -rw-r--r-- 1 glassfish glassfish    5790021 Dec 23 10:54 _bry.cfs
>> -rw-r--r-- 1 glassfish glassfish       1691 Dec 23 13:20 _bry_m.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 10:54 _bry.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 11:33 _bu6.cfe
>> -rw-r--r-- 1 glassfish glassfish    5700578 Dec 23 11:33 _bu6.cfs
>> -rw-r--r-- 1 glassfish glassfish       1855 Dec 23 13:42 _bu6_n.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 11:33 _bu6.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 12:34 _bwy.cfe
>> -rw-r--r-- 1 glassfish glassfish    3720555 Dec 23 12:34 _bwy.cfs
>> -rw-r--r-- 1 glassfish glassfish        720 Dec 23 13:43 _bwy_l.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 12:34 _bwy.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:03 _byn.cfe
>> -rw-r--r-- 1 glassfish glassfish    5097683 Dec 23 13:03 _byn.cfs
>> -rw-r--r-- 1 glassfish glassfish       1137 Dec 23 13:43 _byn_f.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 13:03 _byn.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:09 _byx.cfe
>> -rw-r--r-- 1 glassfish glassfish    7921902 Dec 23 13:09 _byx.cfs
>> -rw-r--r-- 1 glassfish glassfish       1804 Dec 23 13:35 _byx_d.del
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 13:09 _byx.si
>> -rw-r--r-- 1 glassfish glassfish        667 Dec 23 13:41 _c0b_5.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:34 _c0b.cfe
>> -rw-r--r-- 1 glassfish glassfish    2099223 Dec 23 13:34 _c0b.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 13:34 _c0b.si
>> -rw-r--r-- 1 glassfish glassfish        343 Dec 23 13:43 _c0l_3.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:40 _c0l.cfe
>> -rw-r--r-- 1 glassfish glassfish    1936118 Dec 23 13:40 _c0l.cfs
>> -rw-r--r-- 1 glassfish glassfish        301 Dec 23 13:40 _c0l.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:41 _c0m.cfe
>> -rw-r--r-- 1 glassfish glassfish      20135 Dec 23 13:41 _c0m.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:41 _c0m.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:41 _c0n.cfe
>> -rw-r--r-- 1 glassfish glassfish      17897 Dec 23 13:41 _c0n.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:41 _c0n.si
>> -rw-r--r-- 1 glassfish glassfish         57 Dec 23 13:43 _c0o_1.del
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:42 _c0o.cfe
>> -rw-r--r-- 1 glassfish glassfish      50578 Dec 23 13:42 _c0o.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:42 _c0o.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:42 _c0p.cfe
>> -rw-r--r-- 1 glassfish glassfish      86320 Dec 23 13:42 _c0p.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:42 _c0p.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:43 _c0q.cfe
>> -rw-r--r-- 1 glassfish glassfish      16508 Dec 23 13:43 _c0q.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:43 _c0q.si
>> -rw-r--r-- 1 glassfish glassfish        350 Dec 23 13:43 _c0r.cfe
>> -rw-r--r-- 1 glassfish glassfish       5810 Dec 23 13:43 _c0r.cfs
>> -rw-r--r-- 1 glassfish glassfish        263 Dec 23 13:43 _c0r.si
>> -rw-r--r-- 1 glassfish glassfish          0 Dec 23 13:43 _c0s.fdt
>> -rw-r--r-- 1 glassfish glassfish          0 Dec 23 13:43 _c0s.fdx
>> -rw-r--r-- 1 glassfish glassfish       1583 Dec 23 13:43 segments_atq
>> -rw-r--r-- 1 glassfish glassfish         36 Dec 23 13:43 segments.gen
>> -rw-r--r-- 1 glassfish glassfish          0 Dec 22 12:33 write.lock
>>
>>  Regards
>>
>> Piotr
>>

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