Low Hit Ratio for Initial Records buffer

The hit ratio is significant only if the number of requests is many times greater than the capacity of the buffer. A low hit ratio for relatively few accesses to the buffer is therefore normal and does not indicate poor performance.

It is important to observe the number of "Swaps". If the ratio of this number to the number of requests is very high, this indicates that the configuration of the buffer is too small. In this case, you should increase the parameter "rsdb/ntab/entrycount". The maximum number of entries in the "Initial Records" buffer ("Directory Entries Available") is derived from this parameter. It is "rsdb/ntab/entrycount" / 4.

Reference
1250278 - Low "Hit Ratio" for "Initial Records" buffer