Thread

1. Linux 7.0 performance degradation

   Rick Otten <rottenwindfish@gmail.com> — 2026-04-06T14:12:18Z

   I read this article of the weekend which was reporting that the latest
   Linux kernel kills postgresql performance:
   https://www.phoronix.com/news/Linux-7.0-AWS-PostgreSQL-Drop
   
   I haven't seen any discussion here about this yet and was wondering what
   your thoughts are?  Are we doing to have to upgrade our postgresql versions
   before we can upgrade our Linux kernel?  Are there any hacks or tricks or
   workarounds to help mitigate this issue?
   
   Is it real?
   

2. Re: Linux 7.0 performance degradation

   Andreas Karlsson <andreas@proxel.se> — 2026-04-06T14:59:42Z

   On 4/6/26 4:12 PM, Rick Otten wrote:
   > I read this article of the weekend which was reporting that the latest 
   > Linux kernel kills postgresql performance:
   > https://www.phoronix.com/news/Linux-7.0-AWS-PostgreSQL-Drop <https:// 
   > www.phoronix.com/news/Linux-7.0-AWS-PostgreSQL-Drop>
   > 
   > I haven't seen any discussion here about this yet and was wondering what 
   > your thoughts are?  Are we doing to have to upgrade our postgresql 
   > versions before we can upgrade our Linux kernel?  Are there any hacks or 
   > tricks or workarounds to help mitigate this issue?
   > 
   > Is it real?
   
   I recommend reading the linked thread[1] at LKML where Andres determined 
   that the regression is likely only present when you do not use huge 
   pages. So as long as you make sure that you use huge pages, which you 
   should anyway, there is no need to worry about this regression. You can 
   also read some discussion at Hacker News where Andres () is also 
   involved in the discussion[2].
   
   1. 
   https://lore.kernel.org/lkml/xxbnmxqhx4ntc4ztztllbhnral2adogseot2bzu4g5eutxtgza@dzchaqremz32/
   2. https://news.ycombinator.com/item?id=47644864
   
   Andreas