EAS

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   .-EAS--=--256----------------.   
>>-+----------------------------+------------------------------><
   '-EAS--=--number_of_sessions-'   

Specifies the estimated number of concurrent sessions that will be active with this independent logical unit.

If your estimated value is greater than 256, for better performance, use the next higher multiple of 256.

You can use this operand in conjunction with the BSBUF buffer pool start option to support peak session levels. See Buffer Pool start option for information about BSBUF.