GoTech Demo
04

Database Pool Management

Visualize PostgreSQL connection pool lifecycle. Traffic spike at ~5s demonstrates pool saturation.

IDLE
Scale100K
DAU
60K
Peak QPS
30K
WS Conns
10K
Data/Year
10 TB
Go Instances
6
Active / Max
0 / 20
Waiting
0
Total Queries
0
Avg Query
0ms
Pool Saturation0%
Connection Pool (20 slots)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Active: 0
Idle: 0
Connection History
Active
Idle
Max
pg_stat_statements (Top Queries)
QueryAvg DurationCallsTable

Database Management

Connection Pool

Go's database/sql SetMaxOpenConns must align with PostgreSQL max_connections. Formula: instances x pool_size <= max_connections x 0.8

Slow Queries

pg_stat_statements tracks every query's execution stats. Weekly review of top queries by total_time catches performance regressions before users notice.

Saturation

When all connections are in use, new queries queue. This is the #1 cause of latency spikes. The red line on the chart is your danger zone.