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

Remove unneccesarry locks and add comments

pull/6868/head
Gokhan Gulbiz 2023-04-26 15:51:22 +03:00
parent 779af6a7b4
commit 817b1dfb64
No known key found for this signature in database
GPG Key ID: 608EF06B6BD1B45B
1 changed files with 13 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
src/backend/distributed/utils/citus_stat_tenants.c
View File

@ -128,25 +128,24 @@ citus_stat_tenants_local(PG_FUNCTION_ARGS)
StatTenantsLimit);
}
// Allocate an array to hold the tenants.
TenantStats **stats = palloc(tenantStatsCount *
sizeof(TenantStats *));
HASH_SEQ_STATUS hash_seq;
TenantStats *stat;
// Get all the tenants from the hash table.
int j = 0;
hash_seq_init(&hash_seq, monitor->tenants);
while ((stat = hash_seq_search(&hash_seq)) != NULL)
{
SpinLockAcquire(&stat->lock);
stats[j++] = stat;
UpdatePeriodsIfNecessary(stat, monitoringTime);
ReduceScoreIfNecessary(stat, monitoringTime);
SpinLockRelease(&stat->lock);
}
// Sort the tenants by their score.
SafeQsort(stats, j, sizeof(TenantStats *),
CompareTenantScore);
@ -157,8 +156,6 @@ citus_stat_tenants_local(PG_FUNCTION_ARGS)
TenantStats *tenantStats = stats[i];
SpinLockAcquire(&tenantStats->lock);
values[0] = Int32GetDatum(tenantStats->key.colocationGroupId);
values[1] = PointerGetDatum(cstring_to_text(tenantStats->key.tenantAttribute));
values[2] = Int32GetDatum(tenantStats->readsInThisPeriod);
@ -171,8 +168,6 @@ citus_stat_tenants_local(PG_FUNCTION_ARGS)
values[7] = Float8GetDatum(tenantStats->cpuUsageInLastPeriod);
values[8] = Int64GetDatum(tenantStats->score);
SpinLockRelease(&tenantStats->lock);
tuplestore_putvalues(tupleStore, tupleDescriptor, values, isNulls);
}
@ -212,22 +207,7 @@ citus_stat_tenants_local_reset(PG_FUNCTION_ARGS)
hash_seq_init(&hash_seq, monitor->tenants);
while ((stats = hash_seq_search(&hash_seq)) != NULL)
{
bool found = false;
hash_search(monitor->tenants, &stats->key, HASH_REMOVE, &found);
if (found)
{
stats->writesInLastPeriod = 0;
stats->writesInThisPeriod = 0;
stats->readsInLastPeriod = 0;
stats->readsInThisPeriod = 0;
stats->cpuUsageInLastPeriod = 0;
stats->cpuUsageInThisPeriod = 0;
stats->score = 0;
stats->lastScoreReduction = 0;
/* pfree(stats); */
}
hash_search(monitor->tenants, &stats->key, HASH_REMOVE, NULL);
}
LWLockRelease(&monitor->lock);
@ -739,6 +719,15 @@ CreateTenantStats(MultiTenantMonitor *monitor, TimestampTz queryTime)
pfree(key);
stats->writesInLastPeriod = 0;
stats->writesInThisPeriod = 0;
stats->readsInLastPeriod = 0;
stats->readsInThisPeriod = 0;
stats->cpuUsageInLastPeriod = 0;
stats->cpuUsageInThisPeriod = 0;
stats->score = 0;
stats->lastScoreReduction = 0;
if (!found)
{
/* initialize the stats lock for the new entry in the hash table */