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PG-501: Missing Buckets and incorrect calls count.

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Ensuring the outer bound for the bucket is an exclusive boundary and it
as it belongs to the next bucket. To explain the point further, a set of
five second bucket would be:
    Bucket 1: 00:00:00.00 -> 00:00:04.99...
    Bucket 2: 00:00:00.05 -> 00:00:09.99...
    Bucket 3: 00:00:00.10 -> 00:00:14.99...
    ...
This commit is contained in:
Hamid Akhtar
2022-08-29 23:10:36 +05:00
committed by Muhammad Usama
parent bb5e6a4e88
commit 8e4dc948f0
1 changed files with 1 additions and 1 deletions
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pg_stat_monitor.c
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@@ -2170,7 +2170,7 @@ get_next_wbucket(pgssSharedState *pgss)
* definitely make the while condition to fail, we can stop the loop as
* another thread has already updated prev_bucket_sec.
*/
while ((tv.tv_sec - (uint)current_bucket_sec) > ((uint)PGSM_BUCKET_TIME))
while ((tv.tv_sec - (uint)current_bucket_sec) >= ((uint)PGSM_BUCKET_TIME))
{
if (pg_atomic_compare_exchange_u64(&pgss->prev_bucket_sec, &current_bucket_sec, (uint64)tv.tv_sec))
{