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A disadvantage of zram is that the server cannot hibernate when using zram - which is highly unlikely to be a requirement.
Another disadvantage of zram is that it requires a few installs to get it running.
Another disadvantage of zram is that pages will be "swapped in", i.e. decompressed when making a zram configuration change on machines with low memory. Instead ofrestarting the service, rebooting might be a better option.
A disadvantage of zswap is that the server's kernel may not have been compiled to support zswap.
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