EMERGENCY DATABASE SUPPORT
Facing a Database Outage? Send Us the Details.
JusDB emergency database support provides crisis triage and stabilization for production outages, severe replication lag, corrupted storage, and locking cascades across the 24 database technologies we support. Choosing dedicated database reliability engineering over generic cloud ticketing gives you agreed initial-response targets, lock triage that cancels or terminates a blocker only with your approval, and named, audited access.
When downtime threatens operations, send the incident details straight to our database SREs, who triage the problem with you and work to recover production workloads.
Existing clients: your agreement's initial-response target applies. Not yet a client? We review enquiries within 2–4 business hours, Mon–Fri 09:00–18:00 IST.
When to Call JusDB Emergency Support
Don't wait for small issues to become major outages. Contact us immediately if you're experiencing:
Database Crashes
Service not starting, unexpected shutdowns, or boot failures
Replication Issues
Replication lag, slave failures, or sync problems
Data Corruption
Corrupted tables, data recovery needs, or integrity issues
Performance Spikes
Sudden latency increases, lock contention, or query slowdowns
Production Downtime
Service unavailable, high error rates, or SLA breaches
Critical Queries
Slow queries affecting user experience or business operations
Storage Issues
Disk space problems, backup failures, or restore issues
Critical Database Failure Modes We Specialize In
When catastrophic failure strikes, standard documentation and generic cloud knowledge bases fall short. Here are complex failure states JusDB SREs triage and recover, keeping data loss to the minimum the available backups and logs allow:
PostgreSQL Transaction ID (XID) Wraparound Protection
Autovacuum cannot freeze old rows fast enough, often because a long transaction, stale replication slot, or orphaned prepared transaction holds back the xmin horizon. Once age(datfrozenxid) passes autovacuum_freeze_max_age, anti-wraparound vacuums start. If it keeps climbing toward the 2^31 (about 2.1 billion) transaction horizon, PostgreSQL stops assigning new transaction IDs about 3 million short of it, and every write fails.
Find the oldest databases and tables with age(datfrozenxid) and age(relfrozenxid), clear what holds back the horizon (long transactions, stale replication slots, orphaned prepared transactions), then run a targeted VACUUM (FREEZE) with raised cost limits in normal multi-user mode and retune autovacuum so freezing keeps pace.
MySQL / InnoDB Undo Tablespace Corruption & Boot Crash Loop
Kernel OOM or sudden power failure leaves active transaction undo logs with corrupted page checksums, forcing mysqld into a crash loop during startup.
Stage innodb_force_recovery = 3 to skip rollback threads, stream logical table extracts via mysqldump, rebuild clean tablespaces, and replay binary logs from GTID positions.
Patroni / Raft Distributed Quorum Split-Brain
An inter-AZ network partition cuts the primary off from the DCS (etcd/Consul). A replica is promoted, but a hung former primary that could not demote itself keeps accepting writes, and the timelines diverge.
Enforce hardware watchdog STONITH fencing, verify DCS lease expiration, isolate partitioned nodes, and reconcile divergent timelines using pg_rewind to protect consistency.
Why Choose JusDB for Emergency Support
When every minute counts, you need experts who can diagnose and resolve issues fast.
Agreed Response
An engineer starts within your initial-response target, set out under Emergency Coverage by Service Level below
Deep Expertise
DBAs and SREs who work across the major open-source and cloud database engines
Proven Tools
Advanced diagnostics, recovery frameworks, and observability tools
Collaborative Approach
Work alongside your team or cloud provider with minimal disruption
Supported Database Technologies
Our emergency support covers all major open-source and cloud-managed database platforms.
MySQL Ecosystem
- MySQL Community & Enterprise
- Percona Server
- MariaDB
- MySQL Cluster (NDB)
PostgreSQL
- PostgreSQL (all versions)
- PostGIS extensions
- Streaming replication
- Logical replication
Cloud Platforms
- AWS RDS & Aurora
- Google Cloud SQL
- Azure Database
- EC2/GCE self-managed
Container Deployments
- Kubernetes operators
- Docker containers
- Helm charts
- StatefulSets
NoSQL Databases
- MongoDB
- Redis
- Elasticsearch
- ClickHouse
High Availability
- Master-slave setups
- Galera clusters
- Patroni (PostgreSQL HA)
- ProxySQL load balancing
How Emergency Support Works
Our streamlined process gets you from crisis to resolution as quickly as possible.
Initial Triage
Connect with a JusDB engineer via phone, chat, or video call
Secure Access Setup
Set up NDA-backed access through the path your team issues: VPN, bastion host, or SSM
Root Cause Analysis
Fast diagnosis using performance logs, error analysis, and system monitoring
Resolution & Recovery
Query tuning, replication fixes, failover execution, data restore, or performance optimization
Post-Incident Analysis
Detailed post-mortem with actionable recommendations and future prevention strategies
During active outages, running blunt diagnostics or unindexed queries can lock catalogs and exacerbate downtime. JusDB SREs execute lightweight, non-blocking telemetry commands to pinpoint root blockers in seconds:
Identifies active blocking processes, held locks, and waiting transactions without taking heavy catalog locks.
SELECT blocked.pid AS blocked_pid,
blocked.usename,
now() - blocked.query_start AS duration,
blocking.pid AS root_locker_pid,
blocking.query AS blocker_query
FROM pg_stat_activity blocked
JOIN pg_stat_activity blocking
ON blocking.pid = ANY(pg_blocking_pids(blocked.pid))
WHERE blocked.wait_event_type = 'Lock'
ORDER BY duration DESC LIMIT 5;Maps InnoDB engine transaction locks and identifies root blocker thread IDs during concurrency spikes.
SELECT r.trx_id waiting_trx,
r.trx_mysql_thread_id waiting_thread,
b.trx_id blocking_trx,
b.trx_mysql_thread_id blocking_thread,
b.trx_query blocking_statement
FROM performance_schema.data_lock_waits w
JOIN information_schema.innodb_trx b
ON b.trx_id = w.blocking_engine_transaction_id
JOIN information_schema.innodb_trx r
ON r.trx_id = w.requesting_engine_transaction_id;How JusDB Emergency SRE compares to alternative recovery models.
When a production database fails, minutes determine business survival. Here is how JusDB's direct Database SRE crisis response contrasts with cloud provider support, generic MSPs, and unassisted internal escalations.
| Crisis Dimension | JusDB Emergency SRE | Cloud Support (AWS/GCP) | General IT / MSP | Internal On-Call |
|---|---|---|---|---|
| Critical Response (P1 Outage) | Named database engineers join your incident bridge. Initial-response targets (not resolution times): 2 to 4 hours in covered business hours; 30 minutes for P1 incidents with 24x7 on-call. | Published support response targets range from 15 min to 24 h by tier; platform scope, not query or schema work | Depends on the contract; often routed through a general helpdesk queue | Variable; depends on who is on call and how well they know the database |
| Direct Query & Lock Contention Mitigation | Lock triage (identify the root blocker, then cancel or terminate it with your approval) and connection-pool relief, starting within your agreement's initial-response target | Generally out of scope: under the shared responsibility model, query and workload issues stay with you | Limited to blunt server reboots or vertical VM resizing | High risk of killing valid transactions or locking tables further under panic |
| Corrupted Data & Replication Recovery | Deep internals: InnoDB tablespace staging, WAL replay, Patroni split-brain fencing, point-in-time recovery | Point-in-time restore of the managed instance; application-level data repair stays with your team | Unsupported; requires engaging third-party recovery vendors | Trial-and-error commands; high probability of cascading replication desync |
| Access Security & Audit Trail | Named accounts through the access path your team issues (bastion, VPN, or SSM), with short-lived credentials and session logging where your tooling supports them | No direct database access; diagnosis works from the metrics and logs you share | Often shared admin credentials, with access records kept in the ticketing system | Personal developer SSH keys; no centralized emergency audit trail |
| Post-Incident RCA & Prevention Runbooks | Root cause analysis after recovery, on the timeline in your service agreement, with index recommendations, schema adjustments, and prevention runbooks | Post-event summaries for provider-wide incidents, not for your workload | Ticket closure notes; rarely a root cause analysis | Often delayed or abandoned due to standard roadmap backlog demands |
| Cost & Engagement Model | Retainer engagement with initial-response targets set in your service agreement; scope for new enquiries agreed before work starts | Paid support tiers priced at roughly 3–10% of monthly cloud spend, with minimums | Multi-month contracts; emergency work often billed as out-of-scope hours | Hidden cost of engineer burnout, on-call turnover, and hiring replacement DBAs |
Emergency Coverage by Service Level
Emergency response follows the service level in your service agreement.
Business hours
- Initial-response target: 2 to 4 hours · During covered business hours
- Human coverage: Business hours
24x7 on-call
- Initial-response target: 30 minutes · P1 incidents
- Human coverage: 24x7 on-call
Initial-response targets, not resolution guarantees. The target for your engagement is set in your service agreement. 24x7 on-call is available under your service agreement.
Emergency Support FAQ
Quick answers to common questions about our emergency database support services.
How fast can we get connected with your emergency database team?
For clients, it depends on the plan: initial-response targets are 2 to 4 hours in covered business hours; 30 minutes for P1 incidents with 24x7 on-call. These are targets for an engineer to start work, not resolution times. If you are not yet a client, send us the incident details. We review enquiries within 2–4 business hours, Mon–Fri 09:00–18:00 IST. Work starts once scope and access are agreed.
Do you support cloud-native databases like Aurora and Cloud SQL?
Yes, we support all major cloud database platforms including Amazon RDS, Aurora, Google Cloud SQL, Azure Database, as well as self-managed instances on EC2, GCE, and on-premises bare metal.
How do you ensure secure access to our production systems without risking data breaches?
Our engineers use named accounts through the access path your team issues (bastion, VPN, or SSM), with short-lived credentials and session logging where your tooling supports them. You approve the access and can revoke it. JusDB's security practices are aligned with ISO 27001 and SOC 2 Type II, and JusDB is pursuing both certifications (see Terms, section 12).
What if our database is corrupted or failing to boot after an unexpected crash?
Our SREs specialize in deep database forensics: recovering corrupted InnoDB tablespaces using staged innodb_force_recovery levels, repairing PostgreSQL system catalogs, and replaying binary logs or WAL to a point in time, keeping data loss to what the available backups and logs allow.
How do you resolve severe replication lag or split-brain during a crisis?
We identify the root bottleneck—long-running transactions, unindexed foreign keys, or disk I/O stalls—and apply non-blocking fixes. In HA clusters (Patroni, Orchestrator), we verify distributed consensus quorum, execute fencing to eliminate split-brain, and safely resync replicas.
What happens after the immediate incident is resolved?
Once the incident is stable, we deliver a Root Cause Analysis (RCA) document including a detailed incident timeline, root cause diagnosis, immediate remediation steps taken, and permanent prevention runbooks covering index, query, or architecture tuning.
Downtime Is Expensive. Recovery Shouldn't Wait.
Every minute of database downtime costs your business money and user trust. Send us the incident details, and we'll work with you on the fastest safe route to recovery.
Agreed response
Initial-response targets set in your service agreement
24x7 on-call
Available under your service agreement
Named engineers
Database engineers on your incident bridge
Contact us directly: