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A deep dive into Debian 13 /tmp: What's new, and what to do if you don't like it

(lowendbox.com)
150 points shaunpud | 1 comments | 29 Aug 25 02:39 UTC | HN request time: 0.201s | source
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fh973 ◴[29 Aug 25 05:37 UTC] No.45060597[source]▶
Swap on servers somewhat defeats the purpose of ECC memory: your program state is now subject to complex IO path that is not end-to-end checksum protected. Also you get unpredictable performance.

So typically: swap off on servers. Do they have a server story?

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1. dooglius ◴[29 Aug 25 11:39 UTC] No.45062741[source]▶
The purpose of ECC has nothing to do with being "end-to-end". A typical CPU path to/from DRAM will not be end-to-end either, since caches will use different encodings. This is generally considered fine since each I/O segment has error detection in one form or another, both in the CPU-to-memory case and the memory-to-disk case. ECC in general is not like cryptographic authentication where it protects against any possible alteration; it's probabilistic in nature against the most common failure modes.