Redis is taking about 6GB of RAM on startup

[Chinmay Mukhopadhyay]

So my Redis db has one major hashmap. It contains 8,000,000 records. The size of the dump.rdb file is 2.8 GB.
As soon as I start the redis-server, the RAM usage by redis peaks to 6GB and remains in that state. Since my computer has 8GB RAM installed, I am not being able to insert any more records in the redis db. Every time I do that, I get a JedisConnectionException.
Is this RAM consumption normal? Is there something I can do to reduce this?

Here are some screenshots for your reference:

The RAM usage stats:-

The startup time for redis-db:-

This is the exception that I am getting:-

This is the error I get when I try to insert more data:-

Jedis version:

2.8.1

Redis version:

3.0.501

Java version:

1.7.079

[CharSyam]

if your rdbcompress is yes?

then it is possible.

may be add some more physical memory for loading it 

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[Chinmay Mukhopadhyay]

Yes the rdbcompress option is set as 'yes'.
But isn't it turned on so that the size taken is reduced? If I turn it off, then the memory taken will be huge.
Other than adding RAM, is there anything that I can do? Like VM Swapping?

[CharSyam]

if rdbcompression is yes

Redis compressed real data when redis save it to disk. so rdb is 2.8G, its real size is much bigger than 2.8G

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[Javier Guerra Giraldez]

On 20 July 2016 at 06:35, Chinmay Mukhopadhyay <chinm...@gmail.com> wrote:
> Other than adding RAM, is there anything that I can do? Like VM Swapping?

VM swapping turns Redis into a seriously unoptimal disk-based database.

If the amount of RAM you want to use is smaller than your data, then
it would be wiser to use a database actually designed to use disk.

--
Javier