Environmental Characteristics (API Guide)

Go Up to Request Buffer Items and Result Buffer Values (API Guide)

Several items are provided for determining environmental characteristics, such as
the amount of memory currently in use, or the number of database cache buffers currently allocated. These items are described in the following table:

Database Information Items for Environmental Characteristics

Request buffer item	Result buffer contents
current_memory	Amount of server memory (in bytes) currently in use
forced_writes	Number specifying the mode in which database writes are performed (0 for asynchronous, 1 for synchronous)
max_memory	Maximum amount of memory (in bytes) used at one time since the first process attached to the database
num_buffers	Number of memory buffers currently allocated
sweep_interval	Number of transactions that are committed between “sweeps” to remove database record versions that are no longer needed
user_names	Names of all the users currently attached to the database; for each such user, the result buffer contains an isc_info_user_names byte followed by a 1-byte length specifying the number of bytes in the user name, followed by the user name

Note: Not all environmental information items are available on all platforms.

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