New answers tagged performance
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=...
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 ...
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 ...
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 ...
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 ...
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 ...
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.
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
-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 ...
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).
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 ...
Top 50 recent answers are included
Related Tags
performance × 3202linux × 553
mysql × 232
hard-drive × 224
apache-2.2 × 201
networking × 184
windows × 167
raid × 145
nginx × 138
sql-server × 130
ubuntu × 120
performance-tuning × 119
memory × 107
php × 106
virtualization × 100
io × 99
performance-monitoring × 97
windows-server-2008 × 95
storage × 90
web-server × 86
ssd × 82
central-processing-unit × 81
filesystems × 77
vmware-esxi × 76
centos × 68