#1742 No effect setting hsqldb.cache_size & hsqldb.cache_rows in JDBC connection

[YPP]

Dear all,

we are defining below properties in the JDBC connection but only 2 of them seem to be working:

• hsqldb.cache_file_scale set to 128
• hsqldb.cache_size set to 131072000 (128 MB)
• hsqldb.cache_rows (set to 100000)

We're using HyperSQL (2.7.3) in embedded mode.

After initiating the first connection, the .script file generated contains:

• SET FILES SCALE 128
• SET FILES CACHE SIZE 10000
• SET FILES CACHE ROWS 50000

Would there be a bug? Or the 2 properties hsqldb.cache_size and hsqldb.cache_rows cannot be set via the JDBC connection?

Thank you in advance and best regards.

[Fred Toussi]

The cache size prop must be in kilobytes, in this case 128000.

[YPP]

so that property will really only be considered only with certain values?

couldn't a rounding be done in the code to consider all values?

[YPP]

Just tested with 128000 that doesn't work either, the .script file still contains

SET FILES CACHE SIZE 10000.

Maybe that setting isn't supported in JDBC connections?

[Fred Toussi]

Most properties are applied to a new database at the time of creation. Make sure the database files do not exist.

[YPP]

thanks for your quick inputs.

Files don't exist.

Could there be issues with e.g. connection pools?

[Fred Toussi]

Please test without connection pool. I will check this before the next release and if there is a regression it will be fixed.