jpgravel@chromium.org chrome-catan@google.com Reports the time spent in Database::CloseInternal, in microseconds, when closing the {DatabaseTag} database. Only reported for clients with high-resolution clocks. olivierli@chromium.org etienneb@chromium.org Reports the time spent in Database::Open, in microseconds, when opening the {DatabaseTag} database. Reported for failure and success without distinction. Only reported for clients with high-resolution clocks. anthonyvd@chromium.org etienneb@chromium.org Reports the fine-grained reason for a failure in Database::Open. Recorded once per failure to open the {DatabaseTag} database. anthonyvd@chromium.org etienneb@chromium.org Reports sqlite errors triggered during the first attempt at opening the {DatabaseTag} database. anthonyvd@chromium.org etienneb@chromium.org Reports sqlite errors triggered during the second attempt at opening the {DatabaseTag} database. Databases can sometimes trigger a second open attempt if the caller-provided error callback razes the database on open failure. etienneb@chromium.org grt@chromium.org Reports the fine-grained reason for a failure in Database::Raze. Recorded once per failure to raze the {DatabaseTag} database. etienneb@chromium.org jpgravel@chromium.org Reports sqlite errors that triggered when Sql.Database.Raze.FailureReason.{DatabaseTag} is kUnknownError. etienneb@chromium.org grt@chromium.org Reports the time spent in Raze, in microseconds. This typically executed after an unrecoverable errors on {DatabaseTag} database. Only reported for clients with high-resolution clocks. etienneb@chromium.org grt@chromium.org Reports sqlite errors triggered during execution of statements on the {DatabaseTag} database. anthonyvd@chromium.org etienneb@chromium.org Reports the time spent in OpenInternal, in microseconds, when opening the {DatabaseTag} database. Only reported for clients with high-resolution clocks. anthonyvd@chromium.org etienneb@chromium.org Reports the time spent in the sqlite3_open_v2 library call, in microseconds, when opening the {DatabaseTag} database. Only reported for clients with high-resolution clocks. grt@chromium.org etienneb@chromium.org Reports the number of frames written to the database following a successful call to sqlite3_wal_checkpoint_v2. Recorded once for each successful {CheckpointType} for the {DatabaseTag} database. grt@chromium.org etienneb@chromium.org Reports the SQLite result code from a call to sqlite3_wal_checkpoint_v2. Recorded once for each {CheckpointType} for the {DatabaseTag} database. grt@chromium.org etienneb@chromium.org Reports the time spent in a call to sqlite3_wal_checkpoint_v2. Recorded once for each {CheckpointType} for the {DatabaseTag} database. Only reported for clients with high-resolution clocks. etienneb@chromium.org chrome-catan@google.com Outcome of attempting to recover a database with sql::Recovery. etienneb@chromium.org chrome-catan@google.com Outcome of attempting to recover the {DatabaseTag} database with sql::Recovery. etienneb@chromium.org chrome-catan@google.com SQLite result code from attempting to recover a database with sql::Recovery. Note that kNoError does not necessarily indicate that recovery succeeded (see Sql.Recovery.Result for that information), since not all recoveries fail due to SQLite errors (e.g. if a version number could not be read from the meta table). etienneb@chromium.org chrome-catan@google.com SQLite result code from attempting to recover the {DatabaseTag} database with sql::Recovery. Note that kNoError does not necessarily indicate that recovery succeeded (see Sql.Recovery.Result for that information), since not all recoveries fail due to SQLite errors (e.g. if a version number could not be read from the meta table). anthonyvd@chromium.org etienneb@chromium.org Reports the total time spent stepping for a given statement in database {DatabaseTag}, in microseconds. Recorded when the statement is reset/destructed, but only includes the time spent in `StepInternal` since the statement's last reset. Only reported for clients with high-resolution clocks. anthonyvd@chromium.org etienneb@chromium.org Reports the time of a single step of a statement running against {DatabaseTag}, in microseconds. Recorded every time `Step` is called. Only reported for clients with high-resolution clocks. etienneb@chromium.org estade@chromium.org chrome-catan@google.com The number of virtual machine operations executed for {DatabaseTag} database. It is reported once per statement. It can be used as a proxy of total work done by queries executed over the database. etienneb@chromium.org estade@chromium.org chrome-catan@google.com The time it takes to sync SQLite data to disk. The metric is recorded once per flush. A SQLite operation may require multiple sync operation to ensure database consistency.