This section provides a summary of cache turnover:
“Buffers Grabbed” reports the number of buffers that were replaced in all of the caches. The “count” column represents the number of times that Adaptive Server fetched a buffer from the LRU end of the cache, replacing a database page. If the server was recently restarted, so that the buffers are empty, reading a page into an empty buffer is not counted here.
“Buffers Grabbed Dirty” reports the number of times that fetching a buffer found a dirty page at the LRU end of the cache and had to wait while the buffer was written to disk. If this value is nonzero, find out which caches are affected. It represents a serious performance hit.
