The customer just added in PARMLIB member CICSLOGR the parameter:
Is there any way to check if this new setting is actually used?
SYSVIEW does not display the setting of LOG-BUFFER-MAXSIZE. The only place you can verify this is in the CICSLOGR PARMLIB member.
On CICSLOGR display you can see the total size of each CICSLOGR buffer in the BufTot column. This will show you the high water mark that the buffer has used. If the buffer grew to 512M, you would see it here.