> The question is why M$ SQL (173,609ms) is twice fast than SAPDB (319,399ms)
> to insert 10,000 64 byte record. I am not sure JDBC drive play what kind of role this
> performance. One thing I notice is JDBC drive for SAPDB take 150ms than to load than
Maybe the insertion will result in a hot spot. E.g. if you insert
small records at the end of a table, then the last page has to be
locked. This leads to a serialization of the insertions. In this
case there is no benefit from the multiprocessor architecture.
> Mircrosoft JDBC driver. I used default configuration for M$ SQL. The SAPDB
> configuration is used the one from the website. Here is the configuration
>parameters.
>
> param_rmfile
> param_startsession
> param_init OLTP
> param_put MAXCPU 4
> param_put DATA_CACHE 16384
Datacache is the size of the memory used to cache data pages.
You reserved 16384 pages of 8K size => 128 MB memgory in a 2 Gigabyte-
machine. (But if you insert only 10,000 * 64 Byte this should not
really matter ;-)
Martin
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