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https://issues.apache.org/jira/browse/CASSANDRA-19947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17913454#comment-17913454
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Dmitry Konstantinov commented on CASSANDRA-19947:
-------------------------------------------------
I have compared the trunk version vs the latest state of the branch using the
same cassandra stress test as here: CASSANDRA-20165, with no constraints
defines.
It covers only a very basic scenario of course, more like a sanity, but the
results are good, the difference is within a error margin.
like:
baseline:
{code:java}
Results:
Op rate : 161,201 op/s [WRITE: 161,201 op/s]
Partition rate : 161,201 pk/s [WRITE: 161,201 pk/s]
Row rate : 161,201 row/s [WRITE: 161,201 row/s]
Latency mean : 0.6 ms [WRITE: 0.6 ms]
Latency median : 0.5 ms [WRITE: 0.5 ms]
Latency 95th percentile : 0.9 ms [WRITE: 0.9 ms]
Latency 99th percentile : 1.3 ms [WRITE: 1.3 ms]
Latency 99.9th percentile : 9.9 ms [WRITE: 9.9 ms]
Latency max : 135.4 ms [WRITE: 135.4 ms]
Total partitions : 10,000,000 [WRITE: 10,000,000]
Total errors : 0 [WRITE: 0]
Total GC count : 24
Total GC memory : 86.798 GiB
Total GC time : 1.5 seconds
Avg GC time : 62.2 ms
StdDev GC time : 17.2 ms
Total operation time : 00:01:02
{code}
with the changes:
{code:java}
Results:
Op rate : 159,616 op/s [WRITE: 159,616 op/s]
Partition rate : 159,616 pk/s [WRITE: 159,616 pk/s]
Row rate : 159,616 row/s [WRITE: 159,616 row/s]
Latency mean : 0.6 ms [WRITE: 0.6 ms]
Latency median : 0.6 ms [WRITE: 0.6 ms]
Latency 95th percentile : 0.9 ms [WRITE: 0.9 ms]
Latency 99th percentile : 1.2 ms [WRITE: 1.2 ms]
Latency 99.9th percentile : 7.9 ms [WRITE: 7.9 ms]
Latency max : 95.7 ms [WRITE: 95.7 ms]
Total partitions : 10,000,000 [WRITE: 10,000,000]
Total errors : 0 [WRITE: 0]
Total GC count : 27
Total GC memory : 88.244 GiB
Total GC time : 1.5 seconds
Avg GC time : 57.0 ms
StdDev GC time : 21.7 ms
Total operation time : 00:01:02
{code}
I do not see new suspicious places related to CEP-42 in async profiler CPU
profile: [^cpu_profile_cep42.html]
> CEP-42: Constraints Framework
> -----------------------------
>
> Key: CASSANDRA-19947
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19947
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: CQL/Syntax
> Reporter: Bernardo Botella
> Assignee: Bernardo Botella
> Priority: Normal
> Attachments: ci_summary.html, cpu_profile_cep42.html
>
> Time Spent: 24h 40m
> Remaining Estimate: 0h
>
> Add new Constraints framework as described in CEP-42. This initial Jira
> ticket includes the core constraints length and numeric. Follow up tickets
> will include the rest of the constraints described in the CEP.
>
> [https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-42%3A+Constraints+Framework]
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