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1 vote

How dangerous might it be - and what performance gains may be had - by turning vulnerability mitigations off on non-Internet facing servers?

" ... used exclusively on a LAN and is using a relatively well tested distribution like Proxmox, how dangerous would it be to turn off all vulnerability mitigations via the kernel arg mitigations=...
Rob's user avatar
  • 330
0 votes

Could a faulty switch cause upload speeds for some to be slow?

A faulty switch can cause all sorts of problems - but as you wrote, it's not all too likely to fail in a weird way at that exact time. You can simply run a performance test between different nodes or ...
Zac67's user avatar
  • 11.5k
0 votes

To improve SQL performance, why not just put lots of RAM rather than having faster hard disks?

Late answer stating an obvious thing, but... not all SQL database loads are equal. For read-heavy workloads, increasing RAM probably is the most valuable path, followed by using fast NVMe disks (even ...
shodanshok's user avatar
  • 50.4k
3 votes

Ansible performance issues on a huge group

You should try using Mitogen for Ansible, which replaces the host communication part in Ansible with a different approach, and by their words, increases execution speed 1.25x - 7x and decreases CPU ...
Tero Kilkanen's user avatar
2 votes

To improve SQL performance, why not just put lots of RAM rather than having faster hard disks?

Over the years I’ve done ton of work in the space. Here’s what you really have to consider. The first thing is is how largest you’re working data set. You ideally want your working data set to be cash ...
Ace's user avatar
  • 21
8 votes

Ansible performance issues on a huge group

Increase forks You have significant memory and CPU, so a few hundred forks aka worker threads is reasonable even if it they are heavy on resources. ansible.cfg: [defaults] forks = 350 serial is the ...
John Mahowald's user avatar
1 vote

Linux: How to find out whether NIC is causing a bottleneck?

How about netstat. Run netstat -c on the source end, and watch the Send-Q column. A big value means lots of pending data.
Qiu Yangfan's user avatar
0 votes
Accepted

iperf3 download and upload test simultaniously giving abnormal results

I was testing over wireless network or Wi-Fi (which is half-duplex). Two devices cannot transmit/receive simultaneously on the same frequency/channel. Which is the reason for unequal sharing of BW
SAM's user avatar
  • 1
-1 votes

Postfix: high delay in queue manager

You may tweak the following config parameters maximal_queue_lifetime, maximal_backoff_time, or smtp_destination_concurrency_limit You could also install a local dns Resolver like unbound. By caching ...
Turdie's user avatar
  • 2,544
0 votes

Debian 12 higher disk activity than CentOS 7

If running MySQL, try replacing it with MariaDB. I noticed vastly lower IO with the latter (which is the default on CentOS 7).
shodanshok's user avatar
  • 50.4k
0 votes

Debian 12 higher disk activity than CentOS 7

I would suggest to let atop run in the background and review the capture atop makes in an Interval and see if that gives any insight You could also make a script and let that run in the background to ...
Turdie's user avatar
  • 2,544

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