New answers tagged performance
0
votes
nginx and php-fpm waiting for server too long
Yes, there's stuff wrong with your config, but your primary issue is arising within the PHP execution (or any persistence layer such as a DB underneath the PHP).
Check for session contention, ...
- 21.5k
0
votes
nginx and php-fpm waiting for server too long
You should install xhprof, this way you'll see where the time is spent.
Using PECL (https://pecl.php.net/package/xhprof)
pecl install xhprof
And use the xhprof_html and xhprof_lib from this project ...
- 414
2
votes
Accepted
Mellanox ConnectX-7 - Unable to get more than 250 Gbit/s
So the answer ended up being that we needed to set the PCI parameter MAX_ACC_OUT_READ to 128. Once that was set via mlxconfig -y -d mlx5_4 s MAX_ACC_OUT_READ=128 for each card and then power cycling ...
- 367
0
votes
Accepted
Disk saturated by mariadb on CentOS 7, blocks everything
At the end the problem was with one of these softwares (removed with yum):
desktop-file-utils-0.23-2.el7.x86_64
emacs-filesystem-1:24.3-23.el7_9.1.noarch
libsecret-0.18.6-1.el7.x86_64
libxkbfile-1.0....
0
votes
Is there a Unix / Linux command to count lines per second from stdin?
Unfortunately, some of the tools given in these answers are not installed by default in most of the Linux distos.
Here is a piece of command line that should work everytime (Perl is almost everywhere)
...
- 230
0
votes
optimizing ext[234] for small file throughput
I want to add to alfonx's answer for anyone coming across this later. In DSM 7.0, the syno_poweroff_task -d command has been removed. Instead you can use synostgvolume.
synostgvolume --unmount -p /...
- 1
1
vote
Accepted
Does reverse proxying the WebSockets servers make sense from scaling perspective?
Scaling, yes. Manageability, yes. Fault tolerance/high availability - mostly yes. It adds nothing in terms of performance - indeed its adding latency. Significantly it does add security in isolating ...
- 21.5k
2
votes
What happens on the server when a multimedia file gets downloading/playing?
Your logic is off.
If CPU and RAM are still good, there are TWO possible limiting issues.
Bandwidth
IO
And both are totally trivial to check from the server side. Do it.
Now all I'm trying to know ...
- 51.7k
1
vote
Unexpected poor performance with NVMe drives on an X9DR3-F
My experience with Samsung MZVL* drives is abysmal. See https://superuser.com/questions/1721288/ssd-performance-falls-off-a-cliff
I'm trying to find reputable specs on your drive but my main guess is ...
- 260
7
votes
Unexpected poor performance with NVMe drives on an X9DR3-F
Samsung MZVLB256HBHQ-000L7 are small SSDs (256 GB), so you are going to hit the internal NAND bandwidth bottleneck for any writes spanning multiple GB. You can trim them (losing all data currently ...
- 48k
Top 50 recent answers are included