[Koha] Zebra database size

[Viviane Ventura]

Hi, folks
I'm indexing a larger load of Marc records (about 1.600.000) and the size
of /etc/koha/zebradb has about 40GB. Is that right? My mysql database has
about 6GB, much less than zebra index.

There is a way to reduce the zebra index size?

Thanks for help