feat(deploy): production deployment setup and fixes
- Debian-based api image (bookworm-slim), docker/debian mirrors, prisma binaryTargets for openssl 3.0 - nginx: admin SPA under /admin, TLS via acme.sh (ZeroSSL) + auto-renewal cron, http->https redirect - prisma: add origin_goods.delisted migration, sync missing schema (good_image/tag_font_color/good_tags), fix users.createdAt Timestamptz - api: CORS wildcard reflection, helmet CORP cross-origin, price backfill in persistProductDetail, categoryIcon ancestor fallback, mediaByColor per-color gallery in public goods detail - admin: /admin base path (vite + router) - import-data.mjs: udt_name casting, serial sequence advance fix
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---
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title: Configure Idle Connection Timeouts
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impact: HIGH
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impactDescription: Reclaim 30-50% of connection slots from idle clients
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tags: connections, timeout, idle, resource-management
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---
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## Configure Idle Connection Timeouts
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Idle connections waste resources. Configure timeouts to automatically reclaim them.
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**Incorrect (connections held indefinitely):**
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```sql
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-- No timeout configured
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show idle_in_transaction_session_timeout; -- 0 (disabled)
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-- Connections stay open forever, even when idle
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select pid, state, state_change, query
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from pg_stat_activity
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where state = 'idle in transaction';
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-- Shows transactions idle for hours, holding locks
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```
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**Correct (automatic cleanup of idle connections):**
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```sql
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-- Terminate connections idle in transaction after 30 seconds
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alter system set idle_in_transaction_session_timeout = '30s';
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-- Terminate completely idle connections after 10 minutes
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alter system set idle_session_timeout = '10min';
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-- Reload configuration
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select pg_reload_conf();
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```
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For pooled connections, configure at the pooler level:
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```ini
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# pgbouncer.ini
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server_idle_timeout = 60
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client_idle_timeout = 300
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```
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Reference: [Connection Timeouts](https://www.postgresql.org/docs/current/runtime-config-client.html#GUC-IDLE-IN-TRANSACTION-SESSION-TIMEOUT)
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