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feat: perform optimization after seeing many events

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This commit is contained in:
Greg Heartsfield 2022-12-17 23:18:54 -06:00
parent 7c1516c4fb
commit 43222d44e5
1 changed files with 27 additions and 5 deletions
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32
src/db.rs
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@ -38,6 +38,8 @@ pub struct SubmittedEvent {
/// Database file
pub const DB_FILE: &str = "nostr.db";
/// How many persisted events before optimization is triggered
pub const EVENT_COUNT_OPTIMIZE_TRIGGER: usize = 500;
/// Build a database connection pool.
/// # Panics
@ -86,6 +88,12 @@ pub fn build_pool(
pool
}
/// Perform normal maintenance
pub fn optimize_db(conn: &mut PooledConnection) -> Result<()> {
conn.execute_batch("PRAGMA optimize;")?;
Ok(())
}
/// Spawn a database writer that persists events to the SQLite store.
pub async fn db_writer(
settings: Settings,
@ -125,6 +133,8 @@ pub async fn db_writer(
let rps_setting = settings.limits.messages_per_sec;
let mut most_recent_rate_limit = Instant::now();
let mut lim_opt = None;
// Keep rough track of events so we can run optimize eventually.
let mut optimize_counter: usize = 0;
let clock = governor::clock::QuantaClock::default();
if let Some(rps) = rps_setting {
if rps > 0 {
@ -257,6 +267,13 @@ pub async fn db_writer(
notice_tx.try_send(Notice::error(event.id, msg)).ok();
}
}
// Use this as a trigger to do optimization
optimize_counter += 1;
if optimize_counter > EVENT_COUNT_OPTIMIZE_TRIGGER {
info!("running database optimizer");
optimize_counter = 0;
optimize_db(&mut pool.get()?).ok();
}
}
// use rate limit, if defined, and if an event was actually written.
@ -624,7 +641,7 @@ pub async fn db_query(
let start = Instant::now();
// generate SQL query
let (q, p) = query_from_sub(&sub);
trace!("SQL generated in {:?}", start.elapsed());
debug!("SQL generated in {:?}", start.elapsed());
// show pool stats
log_pool_stats(&pool);
// cutoff for displaying slow queries
@ -641,21 +658,26 @@ pub async fn db_query(
// logging for slow queries; show sub and SQL
if first_result_elapsed >= slow_cutoff {
info!(
"going to query for: {:?} (cid: {}, sub: {:?})",
"query req (slow): {:?} (cid: {}, sub: {:?})",
sub, client_id, sub.id
);
info!(
"final query string (slow): {} (cid: {}, sub: {:?})",
"query string (slow): {} (cid: {}, sub: {:?})",
q, client_id, sub.id
);
} else {
trace!(
"going to query for: {:?} (cid: {}, sub: {:?})",
"query req: {:?} (cid: {}, sub: {:?})",
sub,
client_id,
sub.id
);
trace!("final query string: {}", q);
trace!(
"query string: {} (cid: {}, sub: {:?})",
q,
client_id,
sub.id
);
}
debug!(
"first result in {:?} (cid: {}, sub: {:?})",