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PG-310: Bucket is “Done” vs still being current/last. (#321)

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A new column is added to mention that bucket is active or done. there is    
some timing based adjustment was required with that too.   

Co-authored-by: Hamid Akhtar <hamid.akhtar@percona.com>
This commit is contained in:
Ibrar Ahmed
2022-11-23 02:23:28 +05:00
committed by GitHub
parent b4ab2ccc84
commit f7860b472f
5 changed files with 34 additions and 21 deletions
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31
pg_stat_monitor.c
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@@ -36,7 +36,7 @@
PG_MODULE_MAGIC;
#define BUILD_VERSION "2.0.0-dev"
#define PG_STAT_STATEMENTS_COLS 52 /* maximum of above */
#define PG_STAT_STATEMENTS_COLS 53 /* maximum of above */
#define PGSM_TEXT_FILE PGSTAT_STAT_PERMANENT_DIRECTORY "pg_stat_monitor_query"
#define roundf(x,d) ((floor(((x)*pow(10,d))+.5))/pow(10,d))
@@ -1613,15 +1613,12 @@ pg_stat_monitor(PG_FUNCTION_ARGS)
static bool
IsBucketValid(uint64 bucketid)
{
struct tm tm;
time_t bucket_t,
current_t;
double diff_t;
pgssSharedState *pgss = pgsm_get_ss();
memset(&tm, 0, sizeof(tm));
strptime(pgss->bucket_start_time[bucketid], "%Y-%m-%d %H:%M:%S", &tm);
bucket_t = mktime(&tm);
bucket_t = mktime(&pgss->bucket_start_time[bucketid]);
time(&current_t);
diff_t = difftime(current_t, bucket_t);
@@ -1674,7 +1671,7 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
elog(ERROR, "pg_stat_monitor: return type must be a row type");
if (tupdesc->natts != 51)
if (tupdesc->natts != 52)
elog(ERROR, "pg_stat_monitor: incorrect number of output arguments, required %d", tupdesc->natts);
tupstore = tuplestore_begin_heap(true, false, work_mem);
@@ -1749,7 +1746,7 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
{
if (read_query(pgss_qbuf, tmp.info.parentid, parent_query_txt, 0) == 0)
{
int rc = read_query_buffer(bucketid, tmp.info.parentid, parent_query_txt, 0);
int rc = read_query_buffer(bucketid, tmp.info.parentid, parent_query_txt, 0);
if (rc != 1)
snprintf(parent_query_txt, 32, "%s", "<insufficient disk/shared space>");
@@ -1892,7 +1889,11 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
values[i++] = CStringGetTextDatum(tmp.error.message);
/* bucket_start_time at column number 15 */
values[i++] = CStringGetDatum(pgss->bucket_start_time[entry->key.bucket_id]);
{
TimestampTz tm;
tm2timestamp((struct pg_tm*) &pgss->bucket_start_time[entry->key.bucket_id], 0, NULL, &tm);
values[i++] = TimestampGetDatum(tm);
}
if (tmp.calls.calls == 0)
{
/* Query of pg_stat_monitor itslef started from zero count */
@@ -2003,6 +2004,9 @@ pg_stat_monitor_internal(FunctionCallInfo fcinfo,
nulls[i++] = true;
}
values[i++] = BoolGetDatum(toplevel);
values[i++] = BoolGetDatum(pg_atomic_read_u64(&pgss->current_wbucket) != bucketid);
/* clean up and return the tuplestore */
tuplestore_putvalues(tupstore, tupdesc, values, nulls);
}
/* clean up and return the tuplestore */
@@ -2086,13 +2090,16 @@ get_next_wbucket(pgssSharedState *pgss)
tv.tv_sec = (tv.tv_sec) - (tv.tv_sec % PGSM_BUCKET_TIME);
lt = localtime(&tv.tv_sec);
/*
* Year is 1900 behind and month is 0 based, therefore we need to
* adjust that.
*/
lt->tm_year += 1900;
lt->tm_mon += 1;
/* Allign the value in prev_bucket_sec to the bucket start time */
pg_atomic_exchange_u64(&pgss->prev_bucket_sec, (uint64)tv.tv_sec);
snprintf(pgss->bucket_start_time[new_bucket_id], sizeof(pgss->bucket_start_time[new_bucket_id]),
"%04d-%02d-%02d %02d:%02d:%02d", lt->tm_year + 1900, lt->tm_mon + 1, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec);
memcpy(&pgss->bucket_start_time[new_bucket_id], lt, sizeof(struct tm));
return new_bucket_id;
}