box.info.gc()

box.info.gc()¶

Get information about the Tarantool garbage collector. The garbage collector compares vclock (vector clock) values of users and checkpoints, so a look at box.info.gc() may show why the garbage collector has not removed old WAL files, or show what it may soon remove.

• consumers – a list of users whose requests might affect the garbage collector.
• checkpoints – a list of preserved checkpoints.
• checkpoints[n].references – a list of references to a checkpoint.
• checkpoints[n].vclock – a checkpoint’s vclock value.
• checkpoints[n].signature – a sum of a checkpoint’s vclock’s components.
• checkpoint_is_in_progress – true if a checkpoint is in progress, otherwise false
• vclock – the garbage collector’s vclock.
• signature – the sum of the garbage collector’s checkpoint’s components.
• wal_retention_vclock – a vclock value of the oldest write-ahead log file protected from removing by the garbage collector by using the wal.retention_period option.