Author Archives: Bobby

About Bobby

I live in Chandler, Arizona with my wife and three daughters. I work for US Foods, the second largest food distribution company in the United States. I have worked in the Information Technology field since 1989. I have a passion for Oracle database performance tuning because I enjoy challenging technical problems that require an understanding of computer science. I enjoy communicating with people about my work.

US Foods IT Hiring

US Foods IT Jobs: url My company is hiring a number of IT positions with more to come soon. Bobby

Posted in Uncategorized | Leave a comment

MiB – not Men in Black!

Yesterday I was reading over some Kubernetes documentation and ran across the abbreviation MiB. I almost ignored it and kept reading. It seemed to just mean megabytes as in 256 MiB meaning 256 megabytes or 256*1024*1024 bytes. It was here: … Continue reading

Posted in Uncategorized | 2 Comments

Gold image for 19.16 install on RHEL 8

On Red Hat 7 Linux VMs we use a zip of a 19c Oracle home with the latest quarterly database release update applied which at the moment in 19.16, the July 19, 2022 version. Our standard deployment script just unzips … Continue reading

Posted in Uncategorized | Leave a comment

netstat -o shows that (ENABLE=BROKEN) turns on TCP keepalive

In an earlier post I showed a Java program that will login to an Oracle database and wait for 350 seconds. I also talked about how we set the Linux parameter net.ipv4.tcp_keepalive_time to 60 seconds but that I needed to … Continue reading

Posted in Uncategorized | Leave a comment

350 Second Timeout Causes ORA-03135 Errors in AWS DMS

This is a follow up to an earlier post about the 350 second timeout that is built into Amazon Web Services’ (AWS) Gateway Load Balancer (GWLB). The earlier post was about Debezium (DBZ) using its Oracle Connector to pull data … Continue reading

Posted in Uncategorized | 2 Comments

Docker Sample Application behind Zscaler

I am trying to learn about Docker by installing it on an Oracle Linux 7 VM on top of VirtualBox on my work laptop. My work laptop uses Zscaler. I had a bunch of certificate issues and ended up learning … Continue reading

Posted in Uncategorized | 2 Comments

350 second AWS timeout causes JDBC call to hang

When I run the following Java program on an AWS EC2 Linux virtual machine connecting to an Oracle database in my company’s internal network it hangs forever. When I run it on a Linux machine on our internal network it … Continue reading

Posted in Uncategorized | 2 Comments

Do SET_AUDIT_TRAIL_LOCATION before INIT_CLEANUP

This is all old stuff, but I want to record a simple thing I found. I was following Oracle’s support document for setting up audit table cleanup using the DBMS_AUDIT_MGMT package. I used this document: SCRIPT: Basic example to manage … Continue reading

Posted in Uncategorized | 2 Comments

Oracle 21c Laptop Install

Finally got around to installing Oracle 21c on my laptop. I installed it on Oracle’s Linux version 7 running in VirtualBox. There are other posts out there, so I won’t get too detailed. I noticed this post: https://oracle-base.com/articles/21c/oracle-db-21c-installation-on-oracle-linux-7 But I … Continue reading

Posted in Uncategorized | Leave a comment

Dropping sequences whose name starts with ISEQ$$

We had an application that created 500,000 tables and 500,000 sequences and the vendor sent us a cleanup script that we thought would drop the tables but not the sequences. It took us a few attempts to get a cleanup … Continue reading

Posted in Uncategorized | Leave a comment