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Dale Forrey — — source: Informix-list mailing list archive (1991-1998)
Art,
Sorry if I am being a little dense about this but I have a question
about one of the suggestions you made to Mr. Brieck. In answer to question
3 you said:
|
|> 3) Are there any other resources to consider before using distributions
on a
|> large scale?
|
|Yes the data distribution cache (onstat -g dsc). The default cache is
|managed by a hash table with 31 buckets and either 20 or 127 entries per
|bucket (depending on the version, onstat -g dsc reports the current
values).
|If you have more than the default number of active tables (or even close to
|the number) you may want to increase the hash table size by adjusting the
|undocumented ONCONFIG parameters DS_HASHSIZE (must be a prime number,
default
|31) and DS_POOLSIZE (usually a small integer, default 20 or 127).
|
The current output from my onstat -g dsc is:
Informix Dynamic Server Version 7.31.UC3 -- On-Line -- Up 3 days
06:04:42 -- 326656 Kbytes
Distribution Cache:
Number of lists : 31
DS_POOLSIZE : 127
Number of entries : 63 Number of entries in use : 0
Is the number of entries supposed to be compared to the number of lists or
to the DS_POOLSIZE? Thanks for the clarification.
Dale Forrey
Washington State University
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