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-rw-r--r--doc/src/sgml/monitoring.sgml188
-rw-r--r--src/backend/catalog/system_views.sql21
-rw-r--r--src/backend/commands/analyze.c33
-rw-r--r--src/backend/statistics/extended_stats.c23
-rw-r--r--src/backend/utils/adt/pgstatfuncs.c2
-rw-r--r--src/backend/utils/misc/sampling.c6
-rw-r--r--src/include/catalog/catversion.h2
-rw-r--r--src/include/commands/progress.h17
-rw-r--r--src/include/pgstat.h1
-rw-r--r--src/include/utils/sampling.h4
-rw-r--r--src/test/regress/expected/rules.out22
11 files changed, 311 insertions, 8 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 136778cb8ab..0bfd6151c47 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -345,6 +345,14 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
</row>
<row>
+ <entry><structname>pg_stat_progress_analyze</structname><indexterm><primary>pg_stat_progress_analyze</primary></indexterm></entry>
+ <entry>One row for each backend (including autovacuum worker processes) running
+ <command>ANALYZE</command>, showing current progress.
+ See <xref linkend='analyze-progress-reporting'/>.
+ </entry>
+ </row>
+
+ <row>
<entry><structname>pg_stat_progress_create_index</structname><indexterm><primary>pg_stat_progress_create_index</primary></indexterm></entry>
<entry>One row for each backend running <command>CREATE INDEX</command> or <command>REINDEX</command>, showing
current progress.
@@ -3505,11 +3513,185 @@ SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
<para>
<productname>PostgreSQL</productname> has the ability to report the progress of
certain commands during command execution. Currently, the only commands
- which support progress reporting are <command>CREATE INDEX</command>,
- <command>VACUUM</command> and
- <command>CLUSTER</command>. This may be expanded in the future.
+ which support progress reporting are <command>ANALYZE</command>,
+ <command>CLUSTER</command>,
+ <command>CREATE INDEX</command>, and <command>VACUUM</command>.
+ This may be expanded in the future.
+ </para>
+
+ <sect2 id="analyze-progress-reporting">
+ <title>ANALYZE Progress Reporting</title>
+
+ <para>
+ Whenever <command>ANALYZE</command> is running, the
+ <structname>pg_stat_progress_analyze</structname> view will contain a
+ row for each backend that is currently running that command. The tables
+ below describe the information that will be reported and provide
+ information about how to interpret it.
</para>
+ <table id="pg-stat-progress-analyze-view" xreflabel="pg_stat_progress_analyze">
+ <title><structname>pg_stat_progress_analyze</structname> View</title>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Column</entry>
+ <entry>Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+
+ <tbody>
+ <row>
+ <entry><structfield>pid</structfield></entry>
+ <entry><type>integer</type></entry>
+ <entry>Process ID of backend.</entry>
+ </row>
+ <row>
+ <entry><structfield>datid</structfield></entry>
+ <entry><type>oid</type></entry>
+ <entry>OID of the database to which this backend is connected.</entry>
+ </row>
+ <row>
+ <entry><structfield>datname</structfield></entry>
+ <entry><type>name</type></entry>
+ <entry>Name of the database to which this backend is connected.</entry>
+ </row>
+ <row>
+ <entry><structfield>relid</structfield></entry>
+ <entry><type>oid</type></entry>
+ <entry>OID of the table being analyzed.</entry>
+ </row>
+ <row>
+ <entry><structfield>phase</structfield></entry>
+ <entry><type>text</type></entry>
+ <entry>Current processing phase. See <xref linkend="analyze-phases" />.</entry>
+ </row>
+ <row>
+ <entry><structfield>sample_blks_total</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Total number of heap blocks that will be sampled.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>sample_blks_scanned</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Number of heap blocks scanned.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>ext_stats_total</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Number of extended statistics.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>ext_stats_computed</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Number of computed extended statistics computed. This counter only advances when
+ the phase is <literal>computing extended statistics</literal>.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>child_tables_total</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Number of child tables.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>child_tables_done</structfield></entry>
+ <entry><type>bigint</type></entry>
+ <entry>
+ Number of child tables scanned. This counter only advances when the phase
+ is <literal>acquiring inherited sample rows</literal>.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>current_child_table_relid</structfield></entry>
+ <entry><type>oid</type></entry>
+ <entry>OID of the child table currently being scanned. This field is only valid when
+ the phase is <literal>computing extended statistics</literal>.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table id="analyze-phases">
+ <title>ANALYZE phases</title>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>Phase</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry><literal>initializing</literal></entry>
+ <entry>
+ The command is preparing to begin scanning the heap. This phase is
+ expected to be very brief.
+ </entry>
+ </row>
+ <row>
+ <entry><literal>acquiring sample rows</literal></entry>
+ <entry>
+ The command is currently scanning the table given by
+ <structfield>current_relid</structfield> to obtain sample rows.
+ </entry>
+ </row>
+ <row>
+ <entry><literal>acquiring inherited sample rows</literal></entry>
+ <entry>
+ The command is currently scanning child tables to obtain sample rows. Columns
+ <structfield>child_tables_total</structfield>,
+ <structfield>child_tables_done</structfield>, and
+ <structfield>current_child_table_relid</structfield> contain the progress
+ information for this phase.
+ </entry>
+ </row>
+ <row>
+ <entry><literal>computing statistics</literal></entry>
+ <entry>
+ The command is computing statistics from the samples rows obtained during
+ the table scan.
+ </entry>
+ </row>
+ <row>
+ <entry><literal>computing extended statistics</literal></entry>
+ <entry>
+ The command is computing extended statistics from the samples rows obtained
+ durring the table scan.
+ </entry>
+ </row>
+ <row>
+ <entry><literal>finalizing analyze</literal></entry>
+ <entry>
+ The command is updating pg_class. When this phase is completed,
+ <command>ANALYZE</command> will end.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <note>
+ <para>
+ Note that when <command>ANALYZE</command> is run on a partitioned table,
+ all of its partitions are also recursively analyzed as also mentioned on
+ <xref linkend="sql-analyze"/>. In that case, <command>ANALYZE</command>
+ progress is reported first for the parent table, whereby its inheritance
+ statistics are collected, followed by that for each partition.
+ </para>
+ </note>
+ </sect2>
+
<sect2 id="create-index-progress-reporting">
<title>CREATE INDEX Progress Reporting</title>
diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql
index 773edf85e78..b3e82de71e6 100644
--- a/src/backend/catalog/system_views.sql
+++ b/src/backend/catalog/system_views.sql
@@ -957,6 +957,27 @@ CREATE VIEW pg_stat_bgwriter AS
pg_stat_get_buf_alloc() AS buffers_alloc,
pg_stat_get_bgwriter_stat_reset_time() AS stats_reset;
+CREATE VIEW pg_stat_progress_analyze AS
+ SELECT
+ S.pid AS pid, S.datid AS datid, D.datname AS datname,
+ CAST(S.relid AS oid) AS relid,
+ CASE S.param1 WHEN 0 THEN 'initializing'
+ WHEN 1 THEN 'acquiring sample rows'
+ WHEN 2 THEN 'acquiring inherited sample rows'
+ WHEN 3 THEN 'computing statistics'
+ WHEN 4 THEN 'computing extended statistics'
+ WHEN 5 THEN 'finalizing analyze'
+ END AS phase,
+ S.param2 AS sample_blks_total,
+ S.param3 AS sample_blks_scanned,
+ S.param4 AS ext_stats_total,
+ S.param5 AS ext_stats_computed,
+ S.param6 AS child_tables_total,
+ S.param7 AS child_tables_done,
+ CAST(S.param8 AS oid) AS current_child_table_relid
+ FROM pg_stat_get_progress_info('ANALYZE') AS S
+ LEFT JOIN pg_database D ON S.datid = D.oid;
+
CREATE VIEW pg_stat_progress_vacuum AS
SELECT
S.pid AS pid, S.datid AS datid, D.datname AS datname,
diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c
index 53b11d7f09b..c4420ddd7f2 100644
--- a/src/backend/commands/analyze.c
+++ b/src/backend/commands/analyze.c
@@ -35,6 +35,7 @@
#include "catalog/pg_namespace.h"
#include "catalog/pg_statistic_ext.h"
#include "commands/dbcommands.h"
+#include "commands/progress.h"
#include "commands/tablecmds.h"
#include "commands/vacuum.h"
#include "executor/executor.h"
@@ -251,6 +252,8 @@ analyze_rel(Oid relid, RangeVar *relation,
LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
MyPgXact->vacuumFlags |= PROC_IN_ANALYZE;
LWLockRelease(ProcArrayLock);
+ pgstat_progress_start_command(PROGRESS_COMMAND_ANALYZE,
+ RelationGetRelid(onerel));
/*
* Do the normal non-recursive ANALYZE. We can skip this for partitioned
@@ -275,6 +278,8 @@ analyze_rel(Oid relid, RangeVar *relation,
*/
relation_close(onerel, NoLock);
+ pgstat_progress_end_command();
+
/*
* Reset my PGXACT flag. Note: we need this here, and not in vacuum_rel,
* because the vacuum flag is cleared by the end-of-xact code.
@@ -506,6 +511,9 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
* Acquire the sample rows
*/
rows = (HeapTuple *) palloc(targrows * sizeof(HeapTuple));
+ pgstat_progress_update_param(PROGRESS_ANALYZE_PHASE,
+ inh ? PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS_INH :
+ PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS);
if (inh)
numrows = acquire_inherited_sample_rows(onerel, elevel,
rows, targrows,
@@ -526,6 +534,9 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
MemoryContext col_context,
old_context;
+ pgstat_progress_update_param(PROGRESS_ANALYZE_PHASE,
+ PROGRESS_ANALYZE_PHASE_COMPUTE_STATS);
+
col_context = AllocSetContextCreate(anl_context,
"Analyze Column",
ALLOCSET_DEFAULT_SIZES);
@@ -596,6 +607,9 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
attr_cnt, vacattrstats);
}
+ pgstat_progress_update_param(PROGRESS_ANALYZE_PHASE,
+ PROGRESS_ANALYZE_PHASE_FINALIZE_ANALYZE);
+
/*
* Update pages/tuples stats in pg_class ... but not if we're doing
* inherited stats.
@@ -1034,6 +1048,8 @@ acquire_sample_rows(Relation onerel, int elevel,
ReservoirStateData rstate;
TupleTableSlot *slot;
TableScanDesc scan;
+ BlockNumber nblocks;
+ BlockNumber blksdone = 0;
Assert(targrows > 0);
@@ -1043,7 +1059,12 @@ acquire_sample_rows(Relation onerel, int elevel,
OldestXmin = GetOldestXmin(onerel, PROCARRAY_FLAGS_VACUUM);
/* Prepare for sampling block numbers */
- BlockSampler_Init(&bs, totalblocks, targrows, random());
+ nblocks = BlockSampler_Init(&bs, totalblocks, targrows, random());
+
+ /* Report sampling block numbers */
+ pgstat_progress_update_param(PROGRESS_ANALYZE_BLOCKS_TOTAL,
+ nblocks);
+
/* Prepare for sampling rows */
reservoir_init_selection_state(&rstate, targrows);
@@ -1104,6 +1125,9 @@ acquire_sample_rows(Relation onerel, int elevel,
samplerows += 1;
}
+
+ pgstat_progress_update_param(PROGRESS_ANALYZE_BLOCKS_DONE,
+ ++blksdone);
}
ExecDropSingleTupleTableSlot(slot);
@@ -1332,6 +1356,8 @@ acquire_inherited_sample_rows(Relation onerel, int elevel,
* rels have radically different free-space percentages, but it's not
* clear that it's worth working harder.)
*/
+ pgstat_progress_update_param(PROGRESS_ANALYZE_CHILD_TABLES_TOTAL,
+ nrels);
numrows = 0;
*totalrows = 0;
*totaldeadrows = 0;
@@ -1341,6 +1367,9 @@ acquire_inherited_sample_rows(Relation onerel, int elevel,
AcquireSampleRowsFunc acquirefunc = acquirefuncs[i];
double childblocks = relblocks[i];
+ pgstat_progress_update_param(PROGRESS_ANALYZE_CURRENT_CHILD_TABLE_RELID,
+ RelationGetRelid(childrel));
+
if (childblocks > 0)
{
int childtargrows;
@@ -1396,6 +1425,8 @@ acquire_inherited_sample_rows(Relation onerel, int elevel,
* pointers to their TOAST tables in the sampled rows.
*/
table_close(childrel, NoLock);
+ pgstat_progress_update_param(PROGRESS_ANALYZE_CHILD_TABLES_DONE,
+ i + 1);
}
return numrows;
diff --git a/src/backend/statistics/extended_stats.c b/src/backend/statistics/extended_stats.c
index d17b8d9b1f2..03e69d057ff 100644
--- a/src/backend/statistics/extended_stats.c
+++ b/src/backend/statistics/extended_stats.c
@@ -24,10 +24,12 @@
#include "catalog/pg_collation.h"
#include "catalog/pg_statistic_ext.h"
#include "catalog/pg_statistic_ext_data.h"
+#include "commands/progress.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/clauses.h"
#include "optimizer/optimizer.h"
+#include "pgstat.h"
#include "postmaster/autovacuum.h"
#include "statistics/extended_stats_internal.h"
#include "statistics/statistics.h"
@@ -92,6 +94,7 @@ BuildRelationExtStatistics(Relation onerel, double totalrows,
List *stats;
MemoryContext cxt;
MemoryContext oldcxt;
+ int64 ext_cnt;
cxt = AllocSetContextCreate(CurrentMemoryContext,
"BuildRelationExtStatistics",
@@ -101,6 +104,22 @@ BuildRelationExtStatistics(Relation onerel, double totalrows,
pg_stext = table_open(StatisticExtRelationId, RowExclusiveLock);
stats = fetch_statentries_for_relation(pg_stext, RelationGetRelid(onerel));
+ /* report this phase */
+ if (stats != NIL)
+ {
+ const int index[] = {
+ PROGRESS_ANALYZE_PHASE,
+ PROGRESS_ANALYZE_EXT_STATS_TOTAL
+ };
+ const int64 val[] = {
+ PROGRESS_ANALYZE_PHASE_COMPUTE_EXT_STATS,
+ list_length(stats)
+ };
+
+ pgstat_progress_update_multi_param(2, index, val);
+ }
+
+ ext_cnt = 0;
foreach(lc, stats)
{
StatExtEntry *stat = (StatExtEntry *) lfirst(lc);
@@ -165,6 +184,10 @@ BuildRelationExtStatistics(Relation onerel, double totalrows,
/* store the statistics in the catalog */
statext_store(stat->statOid, ndistinct, dependencies, mcv, stats);
+
+ /* for reporting progress */
+ pgstat_progress_update_param(PROGRESS_ANALYZE_EXT_STATS_COMPUTED,
+ ++ext_cnt);
}
table_close(pg_stext, RowExclusiveLock);
diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c
index 3dbf6048acb..74f899f24df 100644
--- a/src/backend/utils/adt/pgstatfuncs.c
+++ b/src/backend/utils/adt/pgstatfuncs.c
@@ -468,6 +468,8 @@ pg_stat_get_progress_info(PG_FUNCTION_ARGS)
/* Translate command name into command type code. */
if (pg_strcasecmp(cmd, "VACUUM") == 0)
cmdtype = PROGRESS_COMMAND_VACUUM;
+ else if (pg_strcasecmp(cmd, "ANALYZE") == 0)
+ cmdtype = PROGRESS_COMMAND_ANALYZE;
else if (pg_strcasecmp(cmd, "CLUSTER") == 0)
cmdtype = PROGRESS_COMMAND_CLUSTER;
else if (pg_strcasecmp(cmd, "CREATE INDEX") == 0)
diff --git a/src/backend/utils/misc/sampling.c b/src/backend/utils/misc/sampling.c
index daf75ee5d97..361c15614e7 100644
--- a/src/backend/utils/misc/sampling.c
+++ b/src/backend/utils/misc/sampling.c
@@ -32,8 +32,10 @@
* Since we know the total number of blocks in advance, we can use the
* straightforward Algorithm S from Knuth 3.4.2, rather than Vitter's
* algorithm.
+ *
+ * Returns the number of blocks that BlockSampler_Next will return.
*/
-void
+BlockNumber
BlockSampler_Init(BlockSampler bs, BlockNumber nblocks, int samplesize,
long randseed)
{
@@ -48,6 +50,8 @@ BlockSampler_Init(BlockSampler bs, BlockNumber nblocks, int samplesize,
bs->m = 0; /* blocks selected so far */
sampler_random_init_state(randseed, bs->randstate);
+
+ return Min(bs->n, bs->N);
}
bool
diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h
index 40c1e8e0b85..6ac57be6a08 100644
--- a/src/include/catalog/catversion.h
+++ b/src/include/catalog/catversion.h
@@ -53,6 +53,6 @@
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 202001091
+#define CATALOG_VERSION_NO 202001151
#endif
diff --git a/src/include/commands/progress.h b/src/include/commands/progress.h
index 3f91b3bf525..12e9d3d42f8 100644
--- a/src/include/commands/progress.h
+++ b/src/include/commands/progress.h
@@ -34,6 +34,23 @@
#define PROGRESS_VACUUM_PHASE_TRUNCATE 5
#define PROGRESS_VACUUM_PHASE_FINAL_CLEANUP 6
+/* Progress parameters for analyze */
+#define PROGRESS_ANALYZE_PHASE 0
+#define PROGRESS_ANALYZE_BLOCKS_TOTAL 1
+#define PROGRESS_ANALYZE_BLOCKS_DONE 2
+#define PROGRESS_ANALYZE_EXT_STATS_TOTAL 3
+#define PROGRESS_ANALYZE_EXT_STATS_COMPUTED 4
+#define PROGRESS_ANALYZE_CHILD_TABLES_TOTAL 5
+#define PROGRESS_ANALYZE_CHILD_TABLES_DONE 6
+#define PROGRESS_ANALYZE_CURRENT_CHILD_TABLE_RELID 7
+
+/* Phases of analyze (as advertised via PROGRESS_ANALYZE_PHASE) */
+#define PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS 1
+#define PROGRESS_ANALYZE_PHASE_ACQUIRE_SAMPLE_ROWS_INH 2
+#define PROGRESS_ANALYZE_PHASE_COMPUTE_STATS 3
+#define PROGRESS_ANALYZE_PHASE_COMPUTE_EXT_STATS 4
+#define PROGRESS_ANALYZE_PHASE_FINALIZE_ANALYZE 5
+
/* Progress parameters for cluster */
#define PROGRESS_CLUSTER_COMMAND 0
#define PROGRESS_CLUSTER_PHASE 1
diff --git a/src/include/pgstat.h b/src/include/pgstat.h
index e5a5d025ba6..36b530bc27f 100644
--- a/src/include/pgstat.h
+++ b/src/include/pgstat.h
@@ -956,6 +956,7 @@ typedef enum ProgressCommandType
{
PROGRESS_COMMAND_INVALID,
PROGRESS_COMMAND_VACUUM,
+ PROGRESS_COMMAND_ANALYZE,
PROGRESS_COMMAND_CLUSTER,
PROGRESS_COMMAND_CREATE_INDEX
} ProgressCommandType;
diff --git a/src/include/utils/sampling.h b/src/include/utils/sampling.h
index a84914b968a..74646846b20 100644
--- a/src/include/utils/sampling.h
+++ b/src/include/utils/sampling.h
@@ -37,8 +37,8 @@ typedef struct
typedef BlockSamplerData *BlockSampler;
-extern void BlockSampler_Init(BlockSampler bs, BlockNumber nblocks,
- int samplesize, long randseed);
+extern BlockNumber BlockSampler_Init(BlockSampler bs, BlockNumber nblocks,
+ int samplesize, long randseed);
extern bool BlockSampler_HasMore(BlockSampler bs);
extern BlockNumber BlockSampler_Next(BlockSampler bs);
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out
index 62eaf90a0f2..70e1e2f78d1 100644
--- a/src/test/regress/expected/rules.out
+++ b/src/test/regress/expected/rules.out
@@ -1852,6 +1852,28 @@ pg_stat_gssapi| SELECT s.pid,
s.gss_enc AS encrypted
FROM pg_stat_get_activity(NULL::integer) s(datid, pid, usesysid, application_name, state, query, wait_event_type, wait_event, xact_start, query_start, backend_start, state_change, client_addr, client_hostname, client_port, backend_xid, backend_xmin, backend_type, ssl, sslversion, sslcipher, sslbits, sslcompression, ssl_client_dn, ssl_client_serial, ssl_issuer_dn, gss_auth, gss_princ, gss_enc)
WHERE (s.client_port IS NOT NULL);
+pg_stat_progress_analyze| SELECT s.pid,
+ s.datid,
+ d.datname,
+ s.relid,
+ CASE s.param1
+ WHEN 0 THEN 'initializing'::text
+ WHEN 1 THEN 'acquiring sample rows'::text
+ WHEN 2 THEN 'acquiring inherited sample rows'::text
+ WHEN 3 THEN 'computing statistics'::text
+ WHEN 4 THEN 'computing extended statistics'::text
+ WHEN 5 THEN 'finalizing analyze'::text
+ ELSE NULL::text
+ END AS phase,
+ s.param2 AS sample_blks_total,
+ s.param3 AS sample_blks_scanned,
+ s.param4 AS ext_stats_total,
+ s.param5 AS ext_stats_computed,
+ s.param6 AS child_tables_total,
+ s.param7 AS child_tables_done,
+ (s.param8)::oid AS current_child_table_relid
+ FROM (pg_stat_get_progress_info('ANALYZE'::text) s(pid, datid, relid, param1, param2, param3, param4, param5, param6, param7, param8, param9, param10, param11, param12, param13, param14, param15, param16, param17, param18, param19, param20)
+ LEFT JOIN pg_database d ON ((s.datid = d.oid)));
pg_stat_progress_cluster| SELECT s.pid,
s.datid,
d.datname,
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-01 08:28:23 +0000