[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tommaso Teofili updated OAK-5192: - Sprint: L10 > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.7 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt, OAK-5192.0.patch, Screen > Shot 2017-07-03 at 16.50.00.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tommaso Teofili updated OAK-5192: - Fix Version/s: (was: 1.7.8) 1.7.7 > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.7 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt, OAK-5192.0.patch, Screen > Shot 2017-07-03 at 16.50.00.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tommaso Teofili updated OAK-5192: - Attachment: Screen Shot 2017-07-03 at 16.50.00.png I've added a multiplier parameter so that the _add, reindex, add/delete_ workflow can be executed multiple times and see how the index grows over time using different configurations. See the attached graph. > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.8 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt, OAK-5192.0.patch, Screen > Shot 2017-07-03 at 16.50.00.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Fix Version/s: (was: 1.7.3) 1.7.8 > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.8 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt, OAK-5192.0.patch > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.4.14#64029)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Tommaso Teofili updated OAK-5192: - Attachment: OAK-5192.0.patch attaching a unit test for testing how different Lucene configurations impact on segment store size. > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt, OAK-5192.0.patch > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Attachment: nonBinSizeTotal.txt binSizeTotal.txt binSize16384.txt binSize100.txt > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png, binSize100.txt, binSize16384.txt, > binSizeTotal.txt, diff.txt.zip, nonBinSizeTotal.txt > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Attachment: (was: diff.txt.zip) > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png, diff.txt.zip > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Attachment: diff.txt.zip > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png, diff.txt.zip > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Attachment: diff.txt.zip > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png, diff.txt.zip > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Attachment: (was: diff.txt.zip) > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig >Assignee: Tommaso Teofili > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[
https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Dürig updated OAK-5192:
---
Attachment: diff.txt.zip
Attached a diff ([^diff.txt.zip]) across 1000 subsequent commits of the sites
longevity test limited to content at {{root/oak:index/lucene}}. Each diff
consists of the time stamp of the respective revision followed by a list of
changes. There are fewer than 999 diffs as I left out the empty ones.
These changes account for 7415993 bytes added in total and 7427450 bytes
removed in total to/from the segment store (that is binaries that went to the
blob store are excluded from these numbers).
[~chetanm], is this what you needed?
> Reduce Lucene related growth of repository size
> ---
>
> Key: OAK-5192
> URL: https://issues.apache.org/jira/browse/OAK-5192
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: lucene, segment-tar
>Reporter: Michael Dürig
>Assignee: Tommaso Teofili
> Labels: perfomance, scalability
> Fix For: 1.8, 1.7.3
>
> Attachments: added-bytes-zoom.png, diff.txt.zip
>
>
> I observed Lucene indexing contributing to up to 99% of repository growth.
> While the size of the index itself is well inside reasonable bounds, the
> overall turnover of data being written and removed again can be as much as
> 99%.
> In the case of the TarMK this negatively impacts overall system performance
> due to fast growing number of tar files / segments, bad locality of
> reference, cache misses/thrashing when looking up segments and vastly
> prolonged garbage collection cycles.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Fix Version/s: 1.7.3 > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig > Labels: perfomance, scalability > Fix For: 1.8, 1.7.3 > > Attachments: added-bytes-zoom.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.15#6346)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Fix Version/s: 1.8 > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig > Labels: perfomance, scalability > Fix For: 1.8 > > Attachments: added-bytes-zoom.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[ https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Dürig updated OAK-5192: --- Labels: perfomance scalability (was: perfomance) > Reduce Lucene related growth of repository size > --- > > Key: OAK-5192 > URL: https://issues.apache.org/jira/browse/OAK-5192 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: lucene, segment-tar >Reporter: Michael Dürig > Labels: perfomance, scalability > Attachments: added-bytes-zoom.png > > > I observed Lucene indexing contributing to up to 99% of repository growth. > While the size of the index itself is well inside reasonable bounds, the > overall turnover of data being written and removed again can be as much as > 99%. > In the case of the TarMK this negatively impacts overall system performance > due to fast growing number of tar files / segments, bad locality of > reference, cache misses/thrashing when looking up segments and vastly > prolonged garbage collection cycles. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (OAK-5192) Reduce Lucene related growth of repository size
[
https://issues.apache.org/jira/browse/OAK-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Dürig updated OAK-5192:
---
Attachment: added-bytes-zoom.png
The following plots show added bytes over time in content (upper plot) and
added bytes over time in index (lower plot). Index is 3 order of magnitudes
above regular content in terms of number of bytes added.
!added-bytes-zoom.png|width=500!
The pattern with the spike every 40s in the writes to the index is caused by
Lucene's merging. Switching from {{SerialMergeScheduler}} to
{{NoMergeScheduler}} flattens the curve out and also reduces the total amount
of data written by factor 13.
> Reduce Lucene related growth of repository size
> ---
>
> Key: OAK-5192
> URL: https://issues.apache.org/jira/browse/OAK-5192
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: lucene, segment-tar
>Reporter: Michael Dürig
> Labels: perfomance
> Attachments: added-bytes-zoom.png
>
>
> I observed Lucene indexing contributing to up to 99% of repository growth.
> While the size of the index itself is well inside reasonable bounds, the
> overall turnover of data being written and removed again can be as much as
> 99%.
> In the case of the TarMK this negatively impacts overall system performance
> due to fast growing number of tar files / segments, bad locality of
> reference, cache misses/thrashing when looking up segments and vastly
> prolonged garbage collection cycles.
--
This message was sent by Atlassian JIRA
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