@uptimearchitect

Uptime Architect

@uptimearchitect

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Independent, vendor-neutral Oracle reliability & performance — RAC, Data Guard, tuning, OCI/Azure

Joined June 2026

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Oracle reliability & performance engineeringuptimearchitect.hashnode.dev5 posts

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UAUptime Architectuptimearchitect.hashnode.devJun 23 · 17 min read

Oracle Wait Events, Decoded: The Half-Dozen

A wait event is not a mystery. It's just a label for time a session spent not on CPU — blocked, waiting for a single block to come back from disk, for a commit to flush, for another session to let go

UAUptime Architectuptimearchitect.hashnode.devJun 23 · 10 min read

Data Guard Switchover vs Failover: Which Role Transition, and When

The two words get used interchangeably in incident bridges, and that confusion costs people data. A switchover and a failover both end with your standby running as the primary — but they are not the s

UAUptime Architectuptimearchitect.hashnode.devJun 23 · 12 min read

RAC Node Eviction: A Troubleshooting Checklist That Starts With "Why"

A node disappears from your cluster at 3am. crsctl stat res -t shows it down, the surviving node logged a reconfiguration, and someone is already asking whether you lost data. You didn't — and that's

UAUptime Architectuptimearchitect.hashnode.devJun 22 · 18 min read

How to Read an AWR Report Without Drowning

An AWR report is a wall of numbers — dozens of sections, hundreds of rows, a thousand ways to get lost chasing a metric that doesn't matter. Most people scroll to "Buffer Hit %", see 99%, and conclude

UAUptime Architectuptimearchitect.hashnode.devJun 7 · 30 min read

The Oracle HA Decision Tree: RAC vs Data Guard vs Both

"We have RAC, so we're covered for DR." It's one of the most expensive sentences in Oracle operations, and I've watched variations of it play out more than once. Real Application Clusters (RAC) and Da

Uptime Architect

About

Available for

Uptime Architect's blogs

Recently published

Oracle Wait Events, Decoded: The Half-Dozen

Data Guard Switchover vs Failover: Which Role Transition, and When

RAC Node Eviction: A Troubleshooting Checklist That Starts With "Why"

How to Read an AWR Report Without Drowning

The Oracle HA Decision Tree: RAC vs Data Guard vs Both

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Uptime Architect

About

Available for

Uptime Architect's blogs

Recently published

Oracle Wait Events, Decoded: The Half-Dozen

Data Guard Switchover vs Failover: Which Role Transition, and When

RAC Node Eviction: A Troubleshooting Checklist That Starts With "Why"

How to Read an AWR Report Without Drowning

The Oracle HA Decision Tree: RAC vs Data Guard vs Both