Topic: In this post you will find a short discussion and pointers to the code of a few sample scripts that I have written using Linux BPF/bcc and uprobes for Orac
Topic: this post is about Linux perf and uprobes for tracing and profiling Oracle workloads for advanced troubleshooting.
Topic: This blog post is about kernel stack profiling and visualization with flame graphs.
Recently we were refreshing our recovery system infrastructure, by moving automatic recoveries to new servers, with big bunch of disks directly connected to each of them. Everything went fine until we started to run recoveries - they were much slower than before, even though they were running on more powerful hardware. We started investigation and found some misconfigurations, but after correcting them, performance gain was still too small.
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