3236329 - Error 10865 when adding memory to a cache - SAP ASE

When trying to add memory to default data cache:

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1> sp_cacheconfig "default data cache", "20G"
2> go
Msg 10865, Level 17, State 2:
Server 'XXXXXXXXX', Procedure 'sp_cacheconfig', Line 2053:
Unable to add memory to the cache (default data cache) as it is too fragmented. Changes will take effect when the server is rebooted. To add memory in the same instance delete the cache and recreate the cache with the required memory.
(return status = 1)

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Restart of server has not helped.

• SAP Adaptive Server Enterprise 16.0 SP03
• LINUX

sp_cacheconfig 10865 Unable to add memory to the cache default data cache fragmented server rebooted delete the cache recreate the cache required memory shmall , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem