Notebook memory

hello everyone,
nice meet you.

i made datalogger several months ago.
mega + rtc + sd card(32g)  + notebook(win7, i5 cpu, 8g ram, 500g hdd)
input: analogue data (0~50v) (10 ports)
scanning cycle : 5 ~ 6 times per sec
working time: always, day long
data storage: sd card,
serial monitor: notebook lcd screen
usually 1 day file size in sd-card: 60 mbyte


but, there problem.
my data logger stops, after 1 week or after 5 days or after 10 days.
i assume notebook's memory insufficient.

from time time, checked notebook's memory  by task manager (pressing ctrl+alt+del on notbook's keyboard).
then can find information such total memory, cashed memory , available memory etc.

in case, cashed memroy becomming more , more increasingly.
natually, available memory becomming less , less.
the cashed memory become 4.5~5 gbyte,  suddenly data logger stops.
then reboot notebook , re-setting arduino program.

for information, serial monitor(notebook) shows me data during 3 or 4 hours.
after that, old data disappeared in screen.
perhaps, data continously stored in buffer memory in notebook?

do have idea solve issue?
i'd operate data logger without stopping.
thank in advance.

i don't think arduino serial monitor (if that's referred to) designed take more moderate amount of data, didn't @ source code. if suspect serial monitor, why don't try more suitable serial monitor, such tera term? should able enable serial logging , monitor handle more data better arduino ide. program entirely on arduino or did program pc? if it's entirely on arduino, try raspberry pi data logger. using coir i5 huge waste.

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