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20 items under this folder.
Aug 22, 2026
A 40-minute outage passed with no alert, and the error-rate panel showed a flat line
target/prometheus
layer/observability
symptom/silent-failure
Aug 22, 2026
A 40-second downstream blip became a 25-minute outage that continued after the downstream recovered
target/istio
layer/config
symptom/outage
symptom/resource-exhaustion
Aug 22, 2026
A revoked account kept working for four hours, and nothing anywhere recorded a problem
target/opa
layer/auth
symptom/silent-failure
Aug 22, 2026
All dashboards developed gaps and Prometheus restarted every twenty minutes
target/prometheus
layer/observability
symptom/outage
symptom/resource-exhaustion
Aug 22, 2026
connect() fails with "cannot assign requested address" at peak, and the downstream is healthy
target/golang
target/linux
layer/capacity
symptom/intermittent-failure
Aug 22, 2026
Consumer lag grows for hours while every consumer is running and logging normally
target/kafka
layer/config
symptom/outage
symptom/data-inconsistency
Aug 22, 2026
Database CPU hits 100% for forty seconds, at a time that moves with each deploy
target/redis
target/postgres
layer/capacity
symptom/latency
symptom/resource-exhaustion
Aug 22, 2026
df says the disk is full, du says it is half empty
target/nginx
layer/storage
symptom/resource-exhaustion
symptom/silent-failure
Aug 22, 2026
DNS lookups inside pods intermittently take exactly 5 seconds
target/kubernetes
target/coredns
layer/network
symptom/intermittent-failure
symptom/latency
Aug 22, 2026
Every query got slower during business hours and recovered overnight, for three weeks
target/aws-ebs
target/postgres
layer/storage
symptom/latency
Aug 22, 2026
Every query on one table stopped, and the migration that caused it had not started yet
target/postgres
layer/database
symptom/outage
Aug 22, 2026
Intermittent 503s that hit the quiet endpoints and never the busy ones
target/istio
target/golang
layer/network
symptom/intermittent-failure
Aug 22, 2026
p99 latency spikes to 400ms while CPU utilisation sits at 30%
target/kubernetes
target/golang
layer/compute
symptom/latency
Aug 22, 2026
Pods restart every few hours with nothing in the application log and the heap at 40%
target/jvm
target/kubernetes
layer/compute
symptom/silent-failure
symptom/intermittent-failure
Aug 22, 2026
"prepared statement does not exist" appears only under concurrency, never in staging
target/pgbouncer
target/postgres
layer/config
symptom/intermittent-failure
Aug 22, 2026
The fix is deployed, the rollout succeeded, and a third of requests still hit the old bug
target/kubernetes
layer/config
symptom/deploy-failure
symptom/intermittent-failure
Aug 22, 2026
The nightly reconciliation ran twice and both runs logged success
target/kubernetes
layer/config
symptom/data-inconsistency
Aug 22, 2026
The same query is fast on a fresh connection and slow forever after the fifth run
target/postgres
layer/database
symptom/latency
Aug 22, 2026
TLS fails from every service, but the site loads fine in a browser
target/nginx
layer/auth
symptom/outage
Aug 22, 2026
Writes keep failing with "read-only transaction" long after the failover finished
target/aws-rds
target/postgres
layer/dns
symptom/outage