external
/
citus
mirror of https://github.com/citusdata/citus.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Speed up logical replication tests to fix flakyness (#6229) 

The isolation_tenant_isolation_nonblocking test would sometimes randomly
fail in CI, because we have a limit of runtime limit of 2 minutes per test.
```
test isolation_tenant_isolation_nonblocking ... make: *** [Makefile:171: check-enterprise-isolation] Terminated

Too long with no output (exceeded 2m0s): context deadline exceeded
```

One solution would obviously be to increase the timeout, but instead I
spent some time to increase the speed of our tests by tweaking some
timings. On my local machine the time it took to run the
isolation_tenant_isolation_nonblocking test went from 75s to 15s.

So now we should easily stay within the 2 minute per test limit.

I also checked if the new settings improved other logical replication
tests, but the impect differs wildly per test. One other example of a
test that runs much quicker due to the change is
isolation_non_blocking_shard_split_fkey. But the shard move tests I
tried are impacted much less.

Example of failed tests: https://app.circleci.com/pipelines/github/citusdata/citus/26373/workflows/4fa660e4-63c8-4844-bef8-70a7bea902b7/jobs/748199
pull/6232/head
Jelte Fennema 2022-08-23 17:37:31 +02:00 committed by GitHub
parent 21780b4f65
commit 1dd775fae8
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/test/regress/pg_regress_multi.pl
View File

@ -451,12 +451,12 @@ push(@pgOptions, "wal_level='logical'");
# Faster logical replication status update so tests with logical replication
# run faster
push(@pgOptions, "wal_receiver_status_interval=1");
push(@pgOptions, "wal_receiver_status_interval=0");
# Faster logical replication apply worker launch so tests with logical
# replication run faster. This is used in ApplyLauncherMain in
# src/backend/replication/logical/launcher.c.
push(@pgOptions, "wal_retrieve_retry_interval=1000");
push(@pgOptions, "wal_retrieve_retry_interval=250");
push(@pgOptions, "max_logical_replication_workers=50");
push(@pgOptions, "max_wal_senders=50");

4
src/test/regress/spec/isolation_tenant_isolation_nonblocking.spec
View File

@ -3,8 +3,8 @@ setup
SET citus.shard_count to 2;
SET citus.shard_replication_factor to 1;
SELECT setval('pg_dist_shardid_seq',
CASE WHEN nextval('pg_dist_shardid_seq') > 1599999 OR nextval('pg_dist_shardid_seq') < 1500000
THEN 1500000
CASE WHEN nextval('pg_dist_shardid_seq') > 1599999 OR nextval('pg_dist_shardid_seq') < 1500072
THEN 1500072
ELSE nextval('pg_dist_shardid_seq')-2
END);