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improvement: drop queries that are running during a checkpoint

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This commit is contained in:
Greg Heartsfield 2022-12-27 15:24:10 -06:00
parent 27902bc5f4
commit 19ec89593d
1 changed files with 17 additions and 0 deletions
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17
src/db.rs
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@ -828,6 +828,17 @@ pub async fn db_query(
sub, client_id, sub.id sub, client_id, sub.id
); );
} }
// check if a checkpoint is trying to run, and abort
if row_count % 100 == 0 {
{
if let Err(_) = safe_to_read.try_lock() {
// lock was held, abort this query
debug!("query aborted due to checkpoint (cid: {}, sub: {:?})", client_id, sub.id);
return Ok(());
}
}
}
// check if this is still active; every 100 rows // check if this is still active; every 100 rows
if row_count % 100 == 0 && abandon_query_rx.try_recv().is_ok() { if row_count % 100 == 0 && abandon_query_rx.try_recv().is_ok() {
debug!("query aborted (cid: {}, sub: {:?})", client_id, sub.id); debug!("query aborted (cid: {}, sub: {:?})", client_id, sub.id);
@ -849,6 +860,12 @@ pub async fn db_query(
let ok: Result<()> = Ok(()); let ok: Result<()> = Ok(());
return ok; return ok;
} }
// check if a checkpoint is trying to run, and abort
if let Err(_) = safe_to_read.try_lock() {
// lock was held, abort this query
debug!("query aborted due to checkpoint (cid: {}, sub: {:?})", client_id, sub.id);
return Ok(());
}
// give the queue a chance to clear before trying again // give the queue a chance to clear before trying again
thread::sleep(Duration::from_millis(100)); thread::sleep(Duration::from_millis(100));
} }