DBNexus Training & Consulting

Oracle DBA training that gets you job-ready. 10,000+ trained · 40+ countries · 18K+ on YouTube. RAC · Data Guard · Performance Tuning · OCI · 26ai · 23ai · 19c.

[DBNexus Training & Consulting @DBNexusTraining]

Cheat sheet: srvctl for Oracle 19c & 26ai RAC — 30 production commands every DBA should know in 2026. Includes PDB resourcification tips and a hands-on drill. Read: https://t.co/54TRYnyFBf #OracleDBA #srvctl #RAC

[DBNexus Training & Consulting @DBNexusTraining]

Add a node to Oracle 19c RAC in 30 minutes — step-by-step lab with commands, checks and a live video. Production-ready and repeatable. Read more: https://t.co/uz91Z4n0pq #Oracle19c #RAC #DBA #AddNode #OracleDBA

[DBNexus Training & Consulting @DBNexusTraining]

Just dropped 🚀

Oracle 26ai RAC Installation on Linux — the complete 2-node setup in one video.

1h 28m covering Grid, ASM, DBCA, validation & troubleshooting.

For DBAs upgrading to Oracle's new AI database.

▶️ https://t.co/w61Hbg3mCG

#Oracle26ai #OracleRAC #OracleDBA

[DBNexus Training & Consulting @DBNexusTraining]

🚨 24 hrs left.
Oracle 26ai Weekend Batch starts TOMORROW (May 23).
Master the world's first AI-native database. 45 sessions. 90 hrs. Sat & Sun, 7–9 AM IST. 10,000+ DBAs trained since 2012.
🔗 https://t.co/kMrnmjSMLM 💬 [phone]
#Oracle26ai #OracleDBA #AIDBA

[DBNexus Training & Consulting @DBNexusTraining]

April 2026 CPU: 8 DB patches, 4 unauth + remote. The sleeper: CVE-2026-35229 — Java VM via Oracle Net, zero creds. Hits 19.3–19.30 and 21.3–21.21.

If you don't use Java VM, just remove it. Patching attack surface you don't run is wasted effort. #OracleDBA

[DBNexus Training & Consulting @DBNexusTraining]

Most Oracle DBAs I train still think OCI is "just another cloud."

It's not. Exadata Cloud Service, autonomous patching, and licensing portability change the job description, not just the platform.

Adapt or stay on-prem forever.

#OCI #OracleDBA #DBNexus

[DBNexus Training & Consulting @DBNexusTraining]

🚀 Oracle 26ai is changing DBA careers.

Upgrade from:
Junior DBA ➜ Senior DBA ➜ Cloud DBA ➜ AI DBA
🔥 Weekend Live Batch
📅 Starts May 23
🎯 45 Sessions | 90 Hours
💻 Live Online + Hands-on Labs

🌐 https://t.co/x5SF4tm1k3
#OracleDBA #Oracle26ai #AIDBA #OracleRAC #DataGuard

[DBNexus Training & Consulting @DBNexusTraining]

🚀 Become Future-Ready with Oracle AI Database 26ai
Learn: ✅ RAC ✅ ASM ✅ Data Guard ✅ RMAN ✅ Performance Tuning ✅ Oracle AI Features ✅ Vector Search
📞 [phone] 🌐 https://t.co/x5SF4tm1k3📝 Register Now: https://t.co/WmxtiR8rIv

#Oracle26ai #OracleTraining #DBNexus

[DBNexus Training & Consulting @DBNexusTraining]

FRA FULL = DATABASE DOWN 💀 | Real Oracle DBA Production Horror Story #o... https://t.co/agkiXwNv6u via @YouTube

[DBNexus Training & Consulting @DBNexusTraining]

2 DAYS until Oracle 26ai training starts.
15 modules | 45 sessions | 90 hours
Weekend: April 11 Weekday: April 13
No mid-batch entry. Now or wait months.
Watch → https://t.co/N1mGEcCIIx → https://t.co/SH93DFj0Oy
#Oracle26ai #OracleDBA #AIVectorSearch #OracleRAC #GoldenGate26ai

[DBNexus Training & Consulting @DBNexusTraining]

Oracle 26ai changes everything for DBAs.
15 modules, 45 live sessions, 90 hours
LIVE training starts April 11.
Watch → https://t.co/N1mGEcCIIx

→ https://t.co/SH93DFj0Oy

No mid-batch entry.
#Oracle26ai #OracleDBA #AIVectorSearch #OracleRAC #GoldenGate26ai #DBATraining

[DBNexus Training & Consulting @DBNexusTraining]

💡 Use DBMS_XPLAN.DISPLAY_CURSOR after running a query to see the ACTUAL execution plan with runtime stats. Compare actual vs estimated rows to catch cardinality misestimates that kill performance.

#OracleDB #SQLTuning #DBA #DBATips #Oracle #DatabaseAdmin

[DBNexus Training & Consulting @DBNexusTraining]

Register NOW ttps://www.oracledbaonlinetraining.com/oracle-26ai-database-training

[DBNexus Training & Consulting @DBNexusTraining]

⚠️ 7 DAYS LEFT

Oracle 26ai Training — First Batch Starts April 11

300+ new features. AI Vector Search. JSON Duality Views. PDB-Level Data Guard. SQL Firewall. GoldenGate 26ai. Oracle RAC on 26ai.

45 Sessions | 90 Hours

[DBNexus Training & Consulting @DBNexusTraining]

Big update: Oracle AI Database 26ai — top 5 features DBAs must know (AI Vector Search, JSON Duality Views, PDB-Level Data Guard, SQL Firewall, True Cache) + full 19c→26ai AutoUpgrade path. Read more: https://t.co/Jpnwax738r #oracledba #oracle26ai #aidatabase #dataguard

[DBNexus Training & Consulting @DBNexusTraining]

⚠️ PSA for Oracle DBAs:

3 things that BREAK after 19c → 26ai upgrade:

1. Case-insensitive passwords → permanently disabled
2. Traditional Auditing → completely removed
3. Non-CDB databases → not supported

Full upgrade path top 5 feature
🎬 https://t.co/MD42hqsDlC

#Oracle

[DBNexus Training & Consulting @DBNexusTraining]

Oracle just laid off ~30,000 people. 6 AM emails. No call. Systems locked instantly.
India alone: ~12,000 impacted
If your company is hiring DBA, Cloud, DevOps roles — reply or DM me. Let's connect talent with opportunity.
#OracleLayoffs #Hiring #OracleDBA
https://t.co/B5xoBpmCfA

[DBNexus Training & Consulting @DBNexusTraining]

💡 Check V$SQL_PLAN_STATISTICS_ALL to compare estimated vs actual rows. When they diverge, thats where your slow query hides. Fix the stats, fix the plan.

#OracleDB #DBA #SQLTuning #DBATips #Oracle

[DBNexus Training & Consulting @DBNexusTraining]

💡 Shared pool fragmentation slowing you down? Check V$SHARED_POOL_RESERVED to see if SHARED_POOL_RESERVED_SIZE needs tuning. A high REQUEST_FAILURES value means your reserved pool is too small.

#OracleDB #DBA #DBATips #OracleDBA #DatabaseAdmin

[DBNexus Training & Consulting @DBNexusTraining]

💡 Stop guessing — use DBMS_XPLAN.DISPLAY_CURSOR with 'ALLSTATS LAST' format to see actual vs estimated rows in your SQL plans. Fastest way to find where the optimizer gets it wrong. #OracleDB #DBA #SQLTuning #DBATips #Oracle