Steven Lacerda – Medium

Steven Lacerda

Steven Lacerda

Troubleshooting Cassandra performance issues

Is the problem with reads or writes? Table specific or in general? Node specific? These are the types of questions you should ask yourself.

Sep 9, 2022

Troubleshooting Cassandra performance issues

Sep 9, 2022

Steven Lacerda

Java Heap Space OOM on Eclipse MAT — How to fix

I had the hardest time increasing the memory for Eclipse MAT because everyone was pointing to an eclipse.ini file, but that file didn’t…

Jan 27, 2022

Java Heap Space OOM on Eclipse MAT — How to fix

Jan 27, 2022

Steven Lacerda

How to hard set readahead in centos 7.4

What I found out is that since the startup scripts no longer run serially, they now run in parallel, adding startup parameters to rc.local…

Oct 19, 2021

Oct 19, 2021

Steven Lacerda

Native transport port and native transport port ssl configuration

Here’s the scenario that was a little non-intuitive to me:

Sep 23, 2021

Sep 23, 2021

Steven Lacerda

How to generate a thread dump in DSE DataStax

When high CPU is an issue, sometimes generating a thread dump is the only way to troubleshoot. You need to see which threads are consuming…

Sep 21, 2021

Sep 21, 2021

Steven Lacerda

Metrics Collector for Apache Cassandra (MCAC) filters to limit load times

The Java jvm for Apache Cassandra and DSE expose hundreds of thousands of different metrics. Trying to pull and store so many metrics is…

Sep 21, 2021

Sep 21, 2021

Steven Lacerda

BYOS (bring your own spark) connecting to Cassandra with TLS/SSL

In order to connect byos Spark to Cassandra using TLS/SSL your shell conf should look something like the following:

Jun 3, 2021

Jun 3, 2021

Steven Lacerda

CQLSH with TLS / SSL enabled

How to set up SSL with cqlsh:

Nov 4, 2020

Nov 4, 2020

Steven Lacerda

Why is my dormant cassandra dc seeing reads?

I have seen an issue where a DC that is not supposed to be receiving traffic is still showing reads. Why is that?

Oct 27, 2020

Client request image

Oct 27, 2020

Steven Lacerda

Clearing up tombstones in cassandra

Tombstones can be created in many different ways, but the most common are:

Oct 7, 2020

Oct 7, 2020

Steven Lacerda

Steven Lacerda

Steve Lacerda is a software engineer specializing in web development. His favorite 80’s song is Let’s Put the X in Sex by Kiss.

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