[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefan Miklosovic updated CASSANDRA-19429:
--
Status: Needs Committer (was: Patch Available)
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, Screenshot 2024-03-19 at 15.22.50.png,
> asprof_cass4.1.3__lock_20240216052912lock.html,
> image-2024-03-08-15-51-30-439.png, image-2024-03-08-15-52-07-902.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefan Miklosovic updated CASSANDRA-19429:
--
Status: Patch Available (was: Review In Progress)
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, Screenshot 2024-03-19 at 15.22.50.png,
> asprof_cass4.1.3__lock_20240216052912lock.html,
> image-2024-03-08-15-51-30-439.png, image-2024-03-08-15-52-07-902.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dipietro Salvatore updated CASSANDRA-19429:
---
Attachment: Screenshot 2024-03-19 at 15.22.50.png
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, Screenshot 2024-03-19 at 15.22.50.png,
> asprof_cass4.1.3__lock_20240216052912lock.html,
> image-2024-03-08-15-51-30-439.png, image-2024-03-08-15-52-07-902.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jon Haddad updated CASSANDRA-19429:
---
Attachment: image-2024-03-08-15-52-07-902.png
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, asprof_cass4.1.3__lock_20240216052912lock.html,
> image-2024-03-08-15-51-30-439.png, image-2024-03-08-15-52-07-902.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jon Haddad updated CASSANDRA-19429:
---
Attachment: image-2024-03-08-15-51-30-439.png
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, asprof_cass4.1.3__lock_20240216052912lock.html,
> image-2024-03-08-15-51-30-439.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dipietro Salvatore updated CASSANDRA-19429:
---
Attachment: Screenshot 2024-02-27 at 11.29.41.png
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png, Screenshot
> 2024-02-27 at 11.29.41.png, asprof_cass4.1.3__lock_20240216052912lock.html
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dipietro Salvatore updated CASSANDRA-19429:
---
Attachment: Screenshot 2024-02-26 at 10.27.10.png
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: Screenshot 2024-02-26 at 10.27.10.png,
> asprof_cass4.1.3__lock_20240216052912lock.html
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
--
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefan Miklosovic updated CASSANDRA-19429:
--
Reviewers: Stefan Miklosovic, Stefan Miklosovic
Stefan Miklosovic, Stefan Miklosovic (was: Stefan Miklosovic)
Status: Review In Progress (was: Patch Available)
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: asprof_cass4.1.3__lock_20240216052912lock.html
>
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stefan Miklosovic updated CASSANDRA-19429:
--
Test and Documentation Plan: ci
Status: Patch Available (was: In Progress)
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: asprof_cass4.1.3__lock_20240216052912lock.html
>
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brandon Williams updated CASSANDRA-19429:
-
Bug Category: Parent values: Degradation(12984)Level 1 values: Performance
Bug/Regression(12997)
Complexity: Normal
Component/s: Local/SSTable
Discovered By: User Report
Fix Version/s: 4.0.x
4.1.x
Severity: Normal
Status: Open (was: Triage Needed)
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
>Reporter: Dipietro Salvatore
>Assignee: Dipietro Salvatore
>Priority: Normal
> Fix For: 4.0.x, 4.1.x
>
> Attachments: asprof_cass4.1.3__lock_20240216052912lock.html
>
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
> bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write
> n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log
> -graph file=cload.html && \
> bin/nodetool compact keyspace1 && sleep 30s && \
> tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m
> cl=ONE -rate threads=406 -node localhost -log file=result.log -graph
> file=graph.html
> {code}
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[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[
https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dipietro Salvatore updated CASSANDRA-19429:
---
Description:
Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
acquires is measured in the `getCapacity` function from
`org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
this limits the CPU utilization of the system to under 50% when testing at full
load and therefore limits the achieved throughput.
Removing the lock contention from the SSTableReader.java file by replacing the
call to `getCapacity` with `size` achieves up to 2.95x increase in throughput
on r8g.24xlarge and 2x on r7i.24xlarge:
|Instance type|Cass 4.1.3|Cass 4.1.3 patched|
|r8g.24xlarge|168k ops|496k ops (2.95x)|
|r7i.24xlarge|153k ops|304k ops (1.98x)|
Instructions to reproduce:
{code:java}
## Requirements for Ubuntu 22.04
sudo apt install -y ant git openjdk-11-jdk
## Build and run
CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f -R
# Run
bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write n=1000
cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log -graph
file=cload.html && \
bin/nodetool compact keyspace1 && sleep 30s && \
tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m cl=ONE
-rate threads=406 -node localhost -log file=result.log -graph file=graph.html
{code}
was:
Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
acquires is measured in the `getCapacity` function from
`org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
this limits the CPU utilization of the system to under 50% when testing at full
load and therefore limits the achieved throughput.
Removing the lock contention from the SSTableReader.java file by replacing the
call to `getCapacity` with `size` achieves up to 2.95x increase in throughput
on r8g.24xlarge and 2x on r7i.24xlarge:
|Instance type|Cass 4.1.3|Cass 4.1.3 patched|
|r8g.24xlarge|168k ops|496k ops (2.95x)|
|r7i.24xlarge|153k ops|304k ops (1.98x)|
Instructions to reproduce:
```bash
#
## Requirements for Ubuntu 22.04
sudo apt install -y ant git openjdk-11-jdk
#
## Build and run
CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f -R
# Run
bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \
bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write n=1000
cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log -graph
file=cload.html && \
bin/nodetool compact keyspace1 && sleep 30s && \
tools/bin/cassandra-stress mixed ratio(write=10,read=90) duration=10m cl=ONE
-rate threads=406 -node localhost -log file=result.log -graph file=graph.html
```
> Remove lock contention generated by getCapacity function in SSTableReader
> -
>
> Key: CASSANDRA-19429
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19429
> Project: Cassandra
> Issue Type: Bug
>Reporter: Dipietro Salvatore
>Priority: Normal
> Attachments: asprof_cass4.1.3__lock_20240216052912lock.html
>
>
> Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock
> acquires is measured in the `getCapacity` function from
> `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60
> seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04),
> this limits the CPU utilization of the system to under 50% when testing at
> full load and therefore limits the achieved throughput.
> Removing the lock contention from the SSTableReader.java file by replacing
> the call to `getCapacity` with `size` achieves up to 2.95x increase in
> throughput on r8g.24xlarge and 2x on r7i.24xlarge:
> |Instance type|Cass 4.1.3|Cass 4.1.3 patched|
> |r8g.24xlarge|168k ops|496k ops (2.95x)|
> |r7i.24xlarge|153k ops|304k ops (1.98x)|
>
> Instructions to reproduce:
> {code:java}
> ## Requirements for Ubuntu 22.04
> sudo apt install -y ant git openjdk-11-jdk
> ## Build and run
> CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar &&
> CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f
> -R
> # Run
> bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \
> bin/cqlsh -e
[jira] [Updated] (CASSANDRA-19429) Remove lock contention generated by getCapacity function in SSTableReader
[ https://issues.apache.org/jira/browse/CASSANDRA-19429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Dipietro Salvatore updated CASSANDRA-19429: --- Description: Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock acquires is measured in the `getCapacity` function from `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60 seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04), this limits the CPU utilization of the system to under 50% when testing at full load and therefore limits the achieved throughput. Removing the lock contention from the SSTableReader.java file by replacing the call to `getCapacity` with `size` achieves up to 2.95x increase in throughput on r8g.24xlarge and 2x on r7i.24xlarge: |Instance type|Cass 4.1.3|Cass 4.1.3 patched| |r8g.24xlarge|168k ops|496k ops (2.95x)| |r7i.24xlarge|153k ops|304k ops (1.98x)| Instructions to reproduce: ```bash # ## Requirements for Ubuntu 22.04 sudo apt install -y ant git openjdk-11-jdk # ## Build and run CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar && CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f -R # Run bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \ bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \ bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log -graph file=cload.html && \ bin/nodetool compact keyspace1 && sleep 30s && \ tools/bin/cassandra-stress mixed ratio(write=10,read=90) duration=10m cl=ONE -rate threads=406 -node localhost -log file=result.log -graph file=graph.html ``` was: Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock acquires is measured in the `getCapacity` function from `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60 seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04), this limits the CPU utilization of the system to under 50% when testing at full load and therefore limits the achieved throughput. Removing the lock contention from the SSTableReader.java file by replacing the call to `getCapacity` with `size` achieves up to 2.95x increase in throughput on r8g.24xlarge and 2x on r7i.24xlarge: | Instance type | Cass 4.1.3 | Cass 4.1.3 patched | | - | -- | -- | | r8g.24xlarge | 168k ops | 496k ops (2.95x) | | r7i.24xlarge | 153k ops | 304k ops (1.98x) | Instructions to reproduce: ```bash ## Requirements for Ubuntu 22.04 sudo apt install -y ant git openjdk-11-jdk ## Build and run CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar && CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f -R # Run bin/cqlsh -e 'drop table if exists keyspace1.standard1;' && \ bin/cqlsh -e 'drop keyspace if exists keyspace1;' && \ bin/nodetool clearsnapshot --all && tools/bin/cassandra-stress write n=1000 cl=ONE -rate threads=384 -node 127.0.0.1 -log file=cload.log -graph file=cload.html && \ bin/nodetool compact keyspace1 && sleep 30s && \ tools/bin/cassandra-stress mixed ratio\(write=10,read=90\) duration=10m cl=ONE -rate threads=406 -node localhost -log file=result.log -graph file=graph.html ``` > Remove lock contention generated by getCapacity function in SSTableReader > - > > Key: CASSANDRA-19429 > URL: https://issues.apache.org/jira/browse/CASSANDRA-19429 > Project: Cassandra > Issue Type: Bug >Reporter: Dipietro Salvatore >Priority: Normal > Attachments: asprof_cass4.1.3__lock_20240216052912lock.html > > > Profiling Cassandra 4.1.3 on large AWS instances, a high number of lock > acquires is measured in the `getCapacity` function from > `org/apache/cassandra/cache/InstrumentingCache` (1.9M lock acquires per 60 > seconds). Based on our tests on r8g.24xlarge instances (using Ubuntu 22.04), > this limits the CPU utilization of the system to under 50% when testing at > full load and therefore limits the achieved throughput. > Removing the lock contention from the SSTableReader.java file by replacing > the call to `getCapacity` with `size` achieves up to 2.95x increase in > throughput on r8g.24xlarge and 2x on r7i.24xlarge: > |Instance type|Cass 4.1.3|Cass 4.1.3 patched| > |r8g.24xlarge|168k ops|496k ops (2.95x)| > |r7i.24xlarge|153k ops|304k ops (1.98x)| > Instructions to reproduce: > ```bash > # > ## Requirements for Ubuntu 22.04 > sudo apt install -y ant git openjdk-11-jdk > # > ## Build and run > CASSANDRA_USE_JDK11=true ant realclean && CASSANDRA_USE_JDK11=true ant jar && > CASSANDRA_USE_JDK11=true ant stress-build && rm -rf data && bin/cassandra -f > -R > # Run >
