pack_write_chunk_size

A transaction is broken up into chunks as it is written to the pack. This option specifies the abstract size of that chunk in bytes. Setting the value too low may result in inefficient database open/recovery, and/or inefficient vacuuming.

Default Value

If the pack_write_chunk_size option is not defined, the default value of 131072 is used.

Example

pack_write_chunk_size=131072

Database Configuration Options

This option key is associated with the RDM_DB handle (or RDM_CPP::Db for C++) and can be set using one of the following functions:

• SQLSetConnectAttr()
• rdm_dbSetOption()
• rdm_dbSetOptions()
• RDM_CPP::Db::SetOption()
• RDM_CPP::Db::SetOptions()

The option key can also be associated with the RDM_TFS handle (or RDM_CPP::TFS for C++) which will be inherited by the next RDM_DB handle (or RDM_CPP::Db for C++) allocated. Modifications to the RDM_TFS after the RDM_DB is allocated have no effect on the allocated RDM_DB. The following functions can be used to set the key/values to be inherited later:

• rdm_tfsSetOptions()
• rdm_tfsSetOption()
• RDM_CPP::TFS::SetOption()
• RDM_CPP::TFS::SetOptions()