Proxy tables in earlier versions of Adaptive Server occupy one extent (8 pages), as well as one extent for each index on a proxy table. In a pre-12.5.0.1 server with 16K logical page size, each proxy table uses 128K worth of space.
In Adaptive Server 12.5.0.1, proxy tables and indexes do not use extents; they use space only in the system catalogs, which Sybase estimates to be 1MB per 100 proxy tables (assuming an average of two indexes per table). The normal upgrade does not reclaim this unused space. To reclaim this space, first drop, then re-create the proxy table.
