• 0 Posts
  • 656 Comments
Joined 3 years ago
cake
Cake day: June 16th, 2023

help-circle




  • Classless interdomain routing is not the point of this post, but basically we started giving people more options for network sizes, and while complex in implementation, it was philosophically virtually uncontroversial.

    You’re talking about 2 different things here. Bit masking part of what is now CIDR was implementable since the mid 90s on network segments, it’s the logic to route packets based on CIDR that was integrated into RIP, GRIP, and BGP.

    Also, CIDR can’t alleviate multi-hop routing address exhaustion.





  • when it clearly should not be doing it.

    No, sorry. We don’t know enough to say this. What were the options when configuring ext4? What record size is grafana using? Mariadb or postgres? Is there contention with another db? Is there a mounted NFS path in the same ext4 partition with weird block settings? There are lots of legitimate config reasons for op’s problem, but there are so many parts of op’s setup we don’t know, we similarly can’t possibly know what the issue is.

    Swappiness works as intended in most default scheduler configurations and seeing high swap is a symptom, not an issue. It is almost always more productive to find out why the swapping is happening.

    Not sure what you’re getting at with TRIM.


  • I agree that hitting swap is not ideal, but messing with swappiness sysctl is almost never the answer and very often leads to more problems than it solves.

    If you want to tune for workload without needing fairly deep understanding of how Linux manages memory, use a sysctl that sets a whole system behaviour like CPU governor presets.

    IMO, Linux is configured for “old” systems by default: slow HDDs, and constrained RAM pools, where disk IO really, really needs caching, and where idle background processes take a large fraction of RAM.

    Not really a matter of opinion, and not true since kernel 5.1 when ssds became first class citizens.










  • I initially set it up because both sonarr and radarr were making their own api calls to indexers and I would get some “daily max exceeded” for certain sites. The idea was that if one host made the calls instead of 2, I wouldn’t get rate limited as much.

    Now I only have my nzb and pb indexers, the first has no such limits because I pay for it, and the second is only used as a second priority, so I don’t really hit limits anymore.

    If you have a bunch of arr services, this is useful. But I only have the two, so I don’t think it’s much work to set indexers up individually.

    Edit: this ^^ is my suggestion. Add the indexers manually.