Model: RB3011UiAS
System health: 23.6 V, 32 C
Resources:
Free memory 976.0 MiB
total memory 1010.8 MiB
CPU ARMv7
Free HDD space 90.4 MiB
Total HDD size 128.3 MiB
OS ver 6.42 (stable)
factory software 6.35.3

partitions:
0 - active - part0 - next (fallback to) - RouterOS v6.42 Apr/13/2018 11:03:46

System logging - default settings
critical - action: echo
error - action: memory
info - action: memmory
system - action: memory
warning - action: memory

In log I see only last log note, nothing else. Why RouterOS dont save logs? Is it software problem or hardware? How can I enable normal logging?
Thx for help!

I have completly same problem with my RB3011 ! I'm waiting to see at 22 o'clock what log file will send me to the mail automaticly !

maybe...
did you try to check how many lines you have setup?
/system logging action print
look for "memory-lines= ..."

Or go to System / Logging / Actions / memory / Lines

maybe...
did you try to check how many lines you have setup?
/system logging action print
look for "memory-lines= ..."

Or go to System / Logging / Actions / memory / Lines

Thank you, I've solved the problem ... System / Logging / Actions / disk / Lines are only 1, but why i don't know - they was set to 1000!

Thx! U was right. It was so simple... Well, at least now I know how to change that parameter )

You are writing to flash memory (Disk) so keep logging to a minimum and lines that are not essential write those to memory.