ASA Database Administration Guide
The Database Server
The database server
Database server options
To increase or decrease the size limit at which packets are compressed.
{ dbsrv9 } -pt
size_in_bytes ...
All operating systems and network servers.
This parameter takes an integer value representing the minimum byte-size of packets to be compressed. Values less than 80 are not recommended. The default is 120 bytes.
Under some circumstances, changing the compression threshold can help performance of a compressed connection by allowing you to only compress packets when compression will increase the speed at which the packets are transferred. The default setting should be appropriate for most cases.
If both client and server specify different compression threshold settings, the client setting applies.
Adjusting communication compression settings to improve performance
CompressionThreshold connection parameter [COMPTH]
Try using Adaptive Server Anywhere's compression features