/usr/share/doc/ntopng/README.redis is in ntopng-data 3.2+dfsg1-1.
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1 2 3 4 5 6 7 8 | In order to avoid redis fillup all the available memory please set some memory limit in /etc/redis.conf
It is a good idea to setup some upper limits such as:
maxmemory 300mb
maxmemory-policy volatile-lru
Of course you need to set these values according to your environment, so your mileage may vary.
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