Persistent lossy Apache logs

Hi to everyone,
why Apache only keep random logs? It is a persistent log loss! I run today

$ zcat -f /var/log/apache2/access.log.* |wc -l
8745

I run the same command tomorrow maybe I get less! Since Sept 2018 till Oct 2019 according to backups I have over 200k hits. Where are the missing?

Is this normal?
Cheers!

 

today

$ zcat -f /var/log/apache2/access.log.* |wc -l
6675

 

zcat -f /var/log/apache2/access.log.* |wc -l
13302
...some days ago was over 16000. BOH!

 

today

zcat -f /var/log/apache2/access.log.* |wc -l
8281

 

Anyone any explanation on this wird behavour?

 

You may need to check and ensure that any log rotation configuration for Apache causing the logs to be truncated on a regular basis.

 

Thanks so much! I am going to check it anyway Apache is running on standard configuration.

 

Let me know if any changes persist with the log rotation configuration so that I can assist you in abetter way.