# How posix\_spawn & close\_range "fixed" cold starts

DevFeed: [How posix\_spawn & close\_range "fixed" cold starts](<https://devfeed.tech/articles/how-posix-spawn-close-range-fixed-cold-starts-5724.md>)

Original publisher: [Read original article](<https://neon.com/blog/posix_spawn-close_range-fixed-cold-starts>)

Author: Christian Schwarz

Published: 2024-02-21T16:06:35Z

Content type: article

Language: en

Sources: [Blog -- Neon Docs](<https://devfeed.tech/sources/blog-neon-docs.md>)

Topics: [Processes](<https://devfeed.tech/topics/processes.md>)

Tags: [database](<https://devfeed.tech/tags/database.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [latency](<https://devfeed.tech/tags/latency.md>), [postgres](<https://devfeed.tech/tags/postgres.md>), [storage](<https://devfeed.tech/tags/storage.md>)

## AI overview

Neon describes investigating a cold-start latency regression while improving stability. The supplied excerpt explains how its Pageserver reconstructs database pages from base images and PostgreSQL write-ahead-log records.

## Source excerpt

Last November, we had several outages and have since directed much of our engineering efforts towards improving stability. During this phase, cold start latency regressed, but the root cause and magnitude were not immediately apparent to us. We made the call to continue working o...