>VLF writes SMF 41 records, but they are unusable for LLA. >Since LLA manages its VLF cache and knows what is in it >and what is not, it will always have a 100% hitratio on >its VLF cache, which will be reported by VLF records 41.
That is not correct. It is true that LLA does know what it put into the cache (as would most VLF exploiters), but (as with all VLF exploiters) it has no idea what VLF has taken out due to trimming. LLA (as with all VLF exploiters) finds out when it goes to retrieve data that it had cached but that VLF has trimmed that the data is no longer available to be retrieved. LLA then acts accordingly. I presume, therefore, that the SMF 41 records do have legitimate information about the amount of trimming that has occurred. If no trimming is occurring, then the cache is not full. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
