ZoneMinder Forums

HARDWARE:
Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
MemTotal: 8048476 kB


SOFTWARE:
We have 2 HDD (both WD 4TB Purple)
System A:
Welcome to Ubuntu 16.04.7 LTS (GNU/Linux 4.4.0-210-generic x86_64)

uname -a
Linux ***-*** 4.4.0-210-generic #242-Ubuntu SMP Fri Apr 16 09:57:56 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
zoneminder 1.30.4

mysql show variables like '%version%';
| innodb_version | 5.7.33 |
| protocol_version | 10 |
| slave_type_conversions | |
| tls_version | TLSv1,TLSv1.1,TLSv1.2 |
| version | 5.7.33-0ubuntu0.16.04.1 |
| version_comment | (Ubuntu) |
| version_compile_machine | x86_64 |
| version_compile_os | Linux |
+-------------------------+-------------------------+

System B:
Ubuntu 20.04 Server
uname -a
Linux ??-?? 5.4.0-80-generic #90-Ubuntu SMP Fri Jul 9 22:49:44 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
zoneminder 1.36.5
copied zm database from 1.30.4 and run zmupdate.pl up to 1.36.5

mysql show variables like '%version%';
| admin_tls_version | TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 |
| immediate_server_version | 999999 |
| innodb_version | 8.0.25 |
| original_server_version | 999999 |
| protocol_version | 10 |
| slave_type_conversions | |
| tls_version | TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 |
| version | 8.0.25-0ubuntu0.20.04.1 |
| version_comment | (Ubuntu) |
| version_compile_machine | x86_64 |
| version_compile_os | Linux |
| version_compile_zlib | 1.2.11 |



ISSUES:
- Running system A described above: Load average around 0.8 and around 10% wa. The CPU load occasionally goes up to 1.2 (audit/filters run).
- With the same hardware, running system B shows load average around 1.8 and 20-30% wa.
- WIth System B, mysql command 'show processlist' shows "waiting for handler commit" status for the Insert Logs command.
- WIth System B, running iostat shows typical iowait of 20%.


QUESTIONS:
- Is this normal behaviour for zm 1.36.5?
- If not, what can we do to reduce load on system B?

Looks normal to me. 1.36.x is a lot different from 1.30.x especially in the memory usage area. Also consider if you are recording video on 1.36.x and not just .jpeg images. Video uses more processes.

You might also do better using Mariadb in place of MySQL.

1.30.4 = 24 analog recording + 6 ip monitor + 1 ip recording to jpeg

1.36.5 = 24 analog recording + 6 ip monitor + 1 ip recording with h264 passthrough

I will try using mariadb and see if there is any load differences vs mysql.

Thanks for the quick reply.

Try lowering analysis FPS (on ZM) and or lower resolution or framerates (on the cameras, not zm). This will lower CPU / ram usage.

The above technique is used for SBCs / ARM based boards to some effect.

To: burger:
Try lowering analysis FPS (on ZM) and or lower resolution or framerates (on the cameras, not zm). This will lower CPU / ram usage.

= the load is tolerable. i am just curious why with the same setup (hardware, fps, resolution, number of cameras etc) has the 1.36.5 showing higher cpu load and iowait compared to 1.30.4.

rtochip wrote: ↑Sat Jul 24, 2021 12:09 am To: burger:
Try lowering analysis FPS (on ZM) and or lower resolution or framerates (on the cameras, not zm). This will lower CPU / ram usage.

= the load is tolerable. i am just curious why with the same setup (hardware, fps, resolution, number of cameras etc) has the 1.36.5 showing higher cpu load and iowait compared to 1.30.4.

Because there has been a regression in performance. See the other threads talking about increased CPU load/memory usage/memory leaks, etc.

rtochip wrote: ↑Sat Jul 24, 2021 12:09 am i am just curious why with the same setup (hardware, fps, resolution, number of cameras etc) has the 1.36.5 showing higher cpu load and iowait compared to 1.30.4.

Timing. The faster code simply has time to do more work. There's alot going on after you start recording a dozen or more cams. I proved my situation by upgrading a 7/27 to a 9/39 Ryzen. The log runs green almost all the time now, and average CPU utilization rates cut almost in half with 4 more cores. Not gonna worry about the code, just hardware.

It's trivially telling how CPU temp tracks across a 30°F range, depending on what ZM features are active at any given time.

Sorry for the late reply but i got busy and just finished dropping mysql and replaced it with mariadb as suggested by bbunge.

Please see observations below for zm 1.36.5 with mariadb Ver 15.1 Distrib 10.3.29-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2:

The iowait is now down to 7.2% to 13% after about 20 minutes of running. It sometimes goes up to 20-30% occasionally presumably due to mp4 file processing?

The CPU is also down to 0.9 to 1.55.

Thanks for the advises, replies and suggestions.