Does the Raspberry Pi have /tmp on a tmpfs file system? If so, just put your working DB there, and every so often (in a separate process) do: 

sqlite3 /tmp/workingDB .dump | sqlite3 /actualfilesystem/newpermanentD
+B

[download]

There's even no need to close your connection from perl.

In reply to Re: Putting an SQLite DB file into memory by tybalt89
in thread Putting an SQLite DB file into memory by stevieb

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