Tiếp tục bài viết "".
Bài viết sẽ kiểm tra và hiển thị, bằng cách sử dụng các truy vấn và ví dụ cụ thể, những thông tin hữu ích nào có thể thu được bằng cách sử dụng lịch sử của chế độ xem pg_stat_activity.
Cảnh báo
Do tính mới của đề tài và chưa hoàn thiện trong thời gian thử nghiệm nên bài viết có thể còn sai sót. Phê bình và bình luận được hoan nghênh và mong đợi.
Dữ liệu đầu vào
lịch sử gửi pg_stat_statements
pg_stat_history
CREATE TABLE pg_stat_history (
id SERIAL,
snapshot_timestamp timestamp without time zone,
database_id integer,
dbid oid,
userid oid,
queryid bigint,
query text,
calls bigint,
total_time double precision,
min_time double precision,
max_time double precision,
mean_time double precision,
stddev_time double precision,
rows bigint,
shared_blks_hit bigint,
shared_blks_read bigint,
shared_blks_dirtied bigint,
shared_blks_written bigint,
local_blks_hit bigint,
local_blks_read bigint,
local_blks_dirtied bigint,
local_blks_written bigint,
temp_blks_read bigint,
temp_blks_written bigint,
blk_read_time double precision,
blk_write_time double precision,
baseline_id integer );Bảng được điền mỗi giờ bằng cách sử dụng dblink tới cơ sở dữ liệu đích. Tất nhiên, cột thú vị và hữu ích nhất trong bảng truy vấn.
lịch sử xem pg_stat_activity
archive_pg_stat_activity
CREATE TABLE archive_pg_stat_activity
(
timepoint timestamp without time zone,
datid oid,
datname name,
pid integer,
usesysid oid,
usename name,
application_name text,
client_addr inet,
client_hostname text,
client_port integer,
backend_start timestamp without time zone,
xact_start timestamp without time zone,
query_start timestamp without time zone,
state_change timestamp without time zone,
wait_event_type text,
wait_event text,
state text,
backend_xid xid,
backend_xmin xid,
query text,
backend_type text,
queryid bigint
);Bảng này là bảng history_pg_stat_activity được phân chia theo giờ (Chi tiết tại đây - và đây -
Выходные данные
THỜI GIAN CPU CỤM (HỆ THỐNG + KHÁCH HÀNG)
Yêu cầu
WITH
t AS
(
SELECT
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
WHERE timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
( aa.wait_event_type IS NULL ) AND
aa.state = 'active'
)
SELECT count(*)
INTO cpu_total
FROM t ;Ví dụ
CLUSTER CPU TIME (SYSTEM + CLIENTS ) : 28:37:46THỜI GIAN CHỜ CỤM
Yêu cầu
WITH
t AS
(
SELECT
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
WHERE timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
( aa.wait_event_type IS NOT NULL ) AND
aa.state = 'active'
)
SELECT count(*)
INTO cpu_total
FROM t ;Ví dụ
CLUSTER WAITINGS TIME : 30:12:49Tổng giá trị pg_stat_statements
Yêu cầu
--TOTAL pg_stat
SELECT
SUM(calls) AS calls, SUM(total_time) AS total_time, SUM(rows) AS rows ,
SUM(shared_blks_hit) AS shared_blks_hit,SUM(shared_blks_read) AS shared_blks_read ,
SUM(shared_blks_dirtied) AS shared_blks_dirtied,SUM(shared_blks_written) AS shared_blks_written ,
SUM(local_blks_hit) AS local_blks_hit , SUM(local_blks_read) AS local_blks_read ,
SUM(local_blks_dirtied) AS local_blks_dirtied , SUM(local_blks_written) AS local_blks_written,
SUM(temp_blks_read) AS temp_blks_read, SUM(temp_blks_written) temp_blks_written ,
SUM(blk_read_time) AS blk_read_time , SUM(blk_write_time) AS blk_write_time
INTO
pg_total_stat_history_rec
FROM
pg_stat_history
WHERE
snapshot_timestamp BETWEEN pg_stat_history_begin AND pg_stat_history_end AND
queryid IS NULL;SQL DBTIME - tổng thời gian thực hiện truy vấn
Yêu cầu
dbtime_total = interval '1 millisecond' * pg_total_stat_history_rec.total_time ;Ví dụ
SQL DBTIME : 136:49:36SQL CPU TIME - Thời gian CPU dành để thực hiện các truy vấn
Yêu cầu
WITH
t AS
(
SELECT
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
WHERE timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
( aa.wait_event_type IS NULL ) AND
backend_type = 'client backend' AND
aa.state = 'active'
)
SELECT count(*)
INTO cpu_total
FROM t ;Ví dụ
SQL CPU TIME : 27:40:15THỜI GIAN CHỜ SQL - tổng thời gian chờ cho các truy vấn
Yêu cầu
WITH
t AS
(
SELECT
date_trunc('second', timepoint)
FROM activity_hist.archive_pg_stat_activity aa
WHERE timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND
( aa.wait_event_type IS NOT NULL ) AND
aa.state = 'active' AND
backend_type = 'client backend'
)
SELECT count(*)
INTO waiting_total
FROM t ;Ví dụ
SQL WAITINGS TIME : 30:04:09Các truy vấn sau đây không quan trọng và chi tiết triển khai được bỏ qua để tiết kiệm dung lượng:
Ví dụ
| SQL IOTIME : 19:44:50
| SQL READ TIME : 19:44:32
| SQL WRITE TIME : 00:00:17
|
| SQL CALLS : 12188248
-------------------------------------------------------------
| SQL SHARED BLOCKS READS : 7997039120
| SQL SHARED BLOCKS HITS : 8868286092
| SQL SHARED BLOCKS HITS/READS % : 110.89
| SQL SHARED BLOCKS DIRTED : 419945
| SQL SHARED BLOCKS WRITTEN : 19857
|
| SQL TEMPORARY BLOCKS READS : 7836169
| SQL TEMPORARY BLOCKS WRITTEN : 10683938
Hãy chuyển sang phần thú vị nhất
TÌNH TRÌNH CHỜ
TOP 10 CHỜ ĐỢI THEO TỔNG THỜI GIAN CHỜ ĐỢI QUY TRÌNH CỦA KHÁCH HÀNG
Yêu cầu
SELECT
wait_event_type , wait_event ,
get_system_waiting_duration( wait_event_type , wait_event ,pg_stat_history_begin+(current_hour_diff * interval '1 hour') ,pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type != 'client backend' AND wait_event_type IS NOT NULL
GROUP BY
wait_event_type, wait_event
ORDER BY 3 DESC
LIMIT 10Ví dụ
+------------------------------------------------ ----------------------------------- | 10 ĐỜI CHỜ HÀNG ĐẦU THEO TỔNG THỜI GIAN CHỜ CHO CÁC QUY TRÌNH HỆ THỐNG +------+------------------------------+-- -------------------+------------------- | #| chờ_event_type| chờ_sự kiện| thời lượng +------+-----------------------------+---------- -- -------+---------- | 1| Hoạt động| LogicLauncherMain| 10:43:28 | 2| Hoạt động| AutoChân khôngMain| 10:42:49 | 3| Hoạt động| WalWriterMain| 10:28:53 | 4| Hoạt động| Con trỏ kiểm traMain| 10:23:50 | 5| Hoạt động| BgWriterMain| 09:11:59 | 6| Hoạt động| BgWriterHibernate| 01:37:46 | 7| IO| BufFileWrite| 00:02:35 | 8| LWLock| đệm_mapping| 00:01:54 | 9| IO| DataFileRead| 00:01:23 | 10| IO| WALWrite| 00:00:59 +------+---------------------+------- -------------+----------
TOP 10 CHỜ ĐỢI THEO TỔNG THỜI GIAN CHỜ ĐỢI QUY TRÌNH CỦA KHÁCH HÀNG
Yêu cầu
SELECT
wait_event_type , wait_event ,
get_clients_waiting_duration( wait_event_type , wait_event , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type = 'client backend' AND wait_event_type IS NOT NULL
GROUP BY wait_event_type, wait_event
ORDER BY 3 DESC
LIMIT 10Ví dụ
+----------+---------------------------+---------- --- ---------+----------+---------- | #| chờ_event_type| chờ_sự kiện| thời lượng| %dbtime +------+---------------------+---------- ----------+----------+---------- | 1| Khóa| giao dịch| 08:16:47| 6.05 | 2| IO| DataFileRead| 06:13:41| 4.55 | 3| Hết thời gian| PgNgủ| 02:53:21| 2.11 | 4| LWLock| đệm_mapping| 00:40:42| 0.5 | 5| LWLock| đệm_io| 00:17:17| 0.21 | 6| IO| BufFileWrite| 00:01:34| 0.02 | 7| Khóa| bộ dữ liệu| 00:01:32| 0.02 | 8| Khách hàng| Khách hàngĐọc| 00:01:19| 0.02 | 9| IO| BufFileRead| 00:00:37| 0.01 | 10| LWLock| đệm_content| 00:00:08| 0 +------+-----------------------------+---------- -- -------+----------+----------
CÁC LOẠI CHỜ ĐỢI THEO TỔNG THỜI GIAN CHỜ ĐỐI VỚI QUY TRÌNH HỆ THỐNG
Yêu cầu
SELECT
wait_event_type ,
get_system_waiting_type_duration( wait_event_type , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type != 'client backend' AND wait_event_type IS NOT NULL
GROUP BY wait_event_type
ORDER BY 2 DESCVí dụ
+----------+---------------------------+---------- --- -------- | #| chờ_event_type| thời lượng +------+-----------------------------+---------- -- ------- | 1| Hoạt động| 53:08:45 | 2| IO| 00:06:24 | 3| LWLock| 00:03:02 +------+---------------------+------- -------------
LOẠI CHỜ ĐỢI THEO TỔNG THỜI GIAN CHỜ ĐỐI VỚI QUY TRÌNH KHÁCH HÀNG
Yêu cầu
SELECT
wait_event_type ,
get_clients_waiting_type_duration( wait_event_type , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type = 'client backend' AND wait_event_type IS NOT NULL
GROUP BY wait_event_type
ORDER BY 2 DESCVí dụ
+----------+---------------------------+---------- --- ---------+---------- | #| chờ_event_type| thời lượng| %dbtime +------+---------------------+---------- ----------+---------------------- | 1| Khóa| 08:18:19| 6.07 | 2| IO| 06:16:01| 4.58 | 3| Hết thời gian| 02:53:21| 2.11 | 4| LWLock| 00:58:12| 0.71 | 5| Khách hàng| 00:01:19| 0.02 | 6| IPC| 00:00:04| 0 +------+-----------------------------+---------- -- -------+----------
Khoảng thời gian chờ đợi cho các quy trình hệ thống và các yêu cầu riêng lẻ.
CHỜ ĐỢI QUY TRÌNH HỆ THỐNG
Yêu cầu
SELECT
backend_type , datname , wait_event_type , wait_event , get_backend_type_waiting_duration( backend_type , wait_event_type , wait_event , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type != 'client backend' AND wait_event_type IS NOT NULL
GROUP BY backend_type , datname , wait_event_type , wait_event
ORDER BY 5 DESCVí dụ
+-----+-----------------------------+----------+--------------------+----------------------+-------------------- | #| backend_type| dbname| wait_event_type| wait_event| duration +-----+-----------------------------+----------+--------------------+----------------------+-------------------- | 1| logical replication launcher| | Activity| LogicalLauncherMain| 10:43:28 | 2| autovacuum launcher| | Activity| AutoVacuumMain| 10:42:49 | 3| walwriter| | Activity| WalWriterMain| 10:28:53 | 4| checkpointer| | Activity| CheckpointerMain| 10:23:50 | 5| background writer| | Activity| BgWriterMain| 09:11:59 | 6| background writer| | Activity| BgWriterHibernate| 01:37:46 | 7| parallel worker| tdb1| IO| BufFileWrite| 00:02:35 | 8| parallel worker| tdb1| LWLock| buffer_mapping| 00:01:41 | 9| parallel worker| tdb1| IO| DataFileRead| 00:01:22 | 10| parallel worker| tdb1| IO| BufFileRead| 00:00:59 | 11| walwriter| | IO| WALWrite| 00:00:57 | 12| parallel worker| tdb1| LWLock| buffer_io| 00:00:47 | 13| autovacuum worker| tdb1| LWLock| buffer_mapping| 00:00:13 | 14| background writer| | IO| DataFileWrite| 00:00:12 | 15| checkpointer| | IO| DataFileWrite| 00:00:11 | 16| walwriter| | LWLock| WALWriteLock| 00:00:09 | 17| checkpointer| | LWLock| WALWriteLock| 00:00:06 | 18| background writer| | LWLock| WALWriteLock| 00:00:06 | 19| walwriter| | IO| WALInitWrite| 00:00:02 | 20| autovacuum worker| tdb1| LWLock| WALWriteLock| 00:00:02 | 21| walwriter| | IO| WALInitSync| 00:00:02 | 22| autovacuum worker| tdb1| IO| DataFileRead| 00:00:01 | 23| checkpointer| | IO| ControlFileSyncUpdate| 00:00:01 | 24| background writer| | IO| WALWrite| 00:00:01 | 25| background writer| | IO| DataFileFlush| 00:00:01 | 26| checkpointer| | IO| SLRUFlushSync| 00:00:01 | 27| autovacuum worker| tdb1| IO| WALWrite| 00:00:01 | 28| checkpointer| | IO| DataFileSync| 00:00:01 +-----+-----------------------------+----------+--------------------+----------------------+--------------------
WAITINGS FOR SQL - chờ các truy vấn riêng lẻ theo queryid
Yêu cầu
SELECT
queryid , datname , wait_event_type , wait_event , get_query_waiting_duration( queryid , wait_event_type , wait_event , pg_stat_history_begin+(current_hour_diff * interval '1 hour') , pg_stat_history_end+(current_hour_diff * interval '1 hour') ) as duration
FROM
activity_hist.archive_pg_stat_activity aa
WHERE
timepoint BETWEEN pg_stat_history_begin+(current_hour_diff * interval '1 hour') AND pg_stat_history_end+(current_hour_diff * interval '1 hour') AND backend_type = 'client backend' AND wait_event_type IS NOT NULL AND queryid IS NOT NULL
GROUP BY queryid , datname , wait_event_type , wait_event
ORDER BY 1 , 5 DESC Ví dụ
+-----+-------------------------+----------+--------------------+--------------------+--------------------+-------------------- | #| queryid| dbname| wait_event_type| wait_event| waitings| total | | | | | | duration| duration +-----+-------------------------+----------+--------------------+--------------------+--------------------+-------------------- | 1| -8247416849404883188| tdb1| Client| ClientRead| 00:00:02| | 2| -6572922443698419129| tdb1| Client| ClientRead| 00:00:05| | 3| -6572922443698419129| tdb1| IO| DataFileRead| 00:00:01| | 4| -5917408132400665328| tdb1| Client| ClientRead| 00:00:04| | 5| -4091009262735781873| tdb1| Client| ClientRead| 00:00:03| | 6| -1473395109729441239| tdb1| Client| ClientRead| 00:00:01| | 7| 28942442626229688| tdb1| IO| BufFileWrite| 00:01:34| 00:46:06 | 8| 28942442626229688| tdb1| LWLock| buffer_mapping| 00:01:05| 00:46:06 | 9| 28942442626229688| tdb1| IO| DataFileRead| 00:00:44| 00:46:06 | 10| 28942442626229688| tdb1| IO| BufFileRead| 00:00:37| 00:46:06 | 11| 28942442626229688| tdb1| LWLock| buffer_io| 00:00:35| 00:46:06 | 12| 28942442626229688| tdb1| Client| ClientRead| 00:00:05| 00:46:06 | 13| 28942442626229688| tdb1| IPC| MessageQueueReceive| 00:00:03| 00:46:06 | 14| 28942442626229688| tdb1| IPC| BgWorkerShutdown| 00:00:01| 00:46:06 | 15| 389015618226997618| tdb1| Lock| transactionid| 03:55:09| 04:14:15 | 16| 389015618226997618| tdb1| IO| DataFileRead| 03:23:09| 04:14:15 | 17| 389015618226997618| tdb1| LWLock| buffer_mapping| 00:12:09| 04:14:15 | 18| 389015618226997618| tdb1| LWLock| buffer_io| 00:10:18| 04:14:15 | 19| 389015618226997618| tdb1| Lock| tuple| 00:00:35| 04:14:15 | 20| 389015618226997618| tdb1| LWLock| WALWriteLock| 00:00:02| 04:14:15 | 21| 389015618226997618| tdb1| IO| DataFileWrite| 00:00:01| 04:14:15 | 22| 389015618226997618| tdb1| LWLock| SyncScanLock| 00:00:01| 04:14:15 | 23| 389015618226997618| tdb1| Client| ClientRead| 00:00:01| 04:14:15 | 24| 734234407411547467| tdb1| Client| ClientRead| 00:00:11| | 25| 734234407411547467| tdb1| LWLock| buffer_mapping| 00:00:05| | 26| 734234407411547467| tdb1| IO| DataFileRead| 00:00:02| | 27| 1237430309438971376| tdb1| LWLock| buffer_mapping| 00:02:18| 02:45:40 | 28| 1237430309438971376| tdb1| IO| DataFileRead| 00:00:27| 02:45:40 | 29| 1237430309438971376| tdb1| Client| ClientRead| 00:00:02| 02:45:40 | 30| 2404820632950544954| tdb1| Client| ClientRead| 00:00:01| | 31| 2515308626622579467| tdb1| Client| ClientRead| 00:00:02| | 32| 4710212362688288619| tdb1| LWLock| buffer_mapping| 00:03:08| 02:18:21 | 33| 4710212362688288619| tdb1| IO| DataFileRead| 00:00:22| 02:18:21 | 34| 4710212362688288619| tdb1| Client| ClientRead| 00:00:06| 02:18:21 | 35| 4710212362688288619| tdb1| LWLock| buffer_io| 00:00:02| 02:18:21 | 36| 9150846928388977274| tdb1| IO| DataFileRead| 00:01:19| | 37| 9150846928388977274| tdb1| LWLock| buffer_mapping| 00:00:34| | 38| 9150846928388977274| tdb1| Client| ClientRead| 00:00:10| | 39| 9150846928388977274| tdb1| LWLock| buffer_io| 00:00:01| +-----+-------------------------+----------+--------------------+--------------------+--------------------+--------------------
THỐNG KÊ SQL KHÁCH HÀNG - Truy vấn HÀNG ĐẦU
Các yêu cầu nhận lại rất tầm thường và không được đưa ra để tiết kiệm dung lượng.
Ví dụ
+------------------------------------------------------------------------------------ | CLIENT SQL ordered by Elapsed Time +--------------------+----------+----------+----------+----------+----------+-------------------- | elapsed time| calls| % dbtime| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+-------------------- | 04:14:15| 19| 3.1| 10.83| 11.52| tdb1| 389015618226997618 | 02:45:40| 746| 2.02| 4.23| 0.08| tdb1| 1237430309438971376 | 02:18:21| 749| 1.69| 3.39| 0.1| tdb1| 4710212362688288619 | 00:46:06| 375| 0.56| 0.94| 0.41| tdb1| 28942442626229688 +--------------------+----------+----------+----------+----------+----------+-------------------- | CLIENT SQL ordered by CPU Time +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | cpu time| calls| % dbtime|total_time| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 02:59:49| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 01:10:12| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 00:56:15| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 00:15:35| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | CLIENT SQL ordered by User I/O Wait Time +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | io_wait time| calls| % dbtime|total_time| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 03:23:10| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 00:02:54| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 00:00:27| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 00:00:22| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | CLIENT SQL ordered by Shared Buffers Reads +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | buffers reads| calls| % dbtime|total_time| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 1056388566| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 11709251| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 3439004| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 3373330| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | CLIENT SQL ordered by Disk Reads Time +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | read time| calls| % dbtime|total_time| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 02:16:30| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 | 00:04:50| 375| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 00:01:10| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 00:00:57| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | CLIENT SQL ordered by Executions +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | calls| rows| % dbtime|total_time| % CPU| % IO| dbname| queryid +--------------------+----------+----------+----------+----------+----------+----------+-------------------- | 749| 749| 1.69| 02:18:21| 3.39| 0.1| tdb1| 4710212362688288619 | 746| 746| 2.02| 02:45:40| 4.23| 0.08| tdb1| 1237430309438971376 | 375| 0| 0.56| 00:46:06| 0.94| 0.41| tdb1| 28942442626229688 | 19| 19| 3.1| 04:14:15| 10.83| 11.52| tdb1| 389015618226997618 +--------------------+----------+----------+----------+----------+----------+----------+--------------------
Tổng
Bằng cách sử dụng các truy vấn đã gửi và báo cáo kết quả, bạn có thể có được bức tranh hoàn chỉnh hơn để phân tích và giải quyết các vấn đề về suy giảm hiệu suất đối với từng truy vấn riêng lẻ và toàn bộ cụm.
Phát triển
Cho đến nay các kế hoạch phát triển như sau:
- Bổ sung báo cáo với lịch sử chặn. Yêu cầu đang được thử nghiệm và sẽ sớm được gửi.
- Sử dụng tiện ích mở rộng TimescaleDB để lưu trữ lịch sử pg_stat_activity và pg_locks.
- Chuẩn bị giải pháp trọn gói trên github để triển khai hàng loạt trên cơ sở sản xuất.
Để được tiếp tục ...
Nguồn: www.habr.com