Struct xfs::Transactions

pub struct Transactions {
    pub waited: u32,
    pub async: u32,
    pub empty: u32,
}

Fields

waited: u32

This is the number of meta-data transactions which waited to be committed to the on-disk log before allowing the process performing the transaction to continue. These transactions are slower and more expensive than asynchronous transactions, because they force the in memory log buffers to be forced to disk more often and they wait for the completion of the log buffer writes. Synchronous transactions include file truncations and all directory updates when the file system is mounted with the 'wsync' option.

async: u32

This is the number of meta-data transactions which did not wait to be committed to the on-disk log before allowing the process performing the transaction to continue. These transactions are faster and more efficient than synchronous transactions, because they commit their data to the in memory log buffers without forcing those buffers to be written to disk. This allows multiple asynchronous transactions to be committed to disk in a single log buffer write. Most transactions used in XFS file systems are asynchronous.

empty: u32

This is the number of meta-data transactions which did not actually change anything. These are transactions which were started for some purpose, but in the end it turned out that no change was necessary.