Updated on 2024-06-03 GMT+08:00

LOCAL_ACTIVE_SESSION

LOCAL_ACTIVE_SESSION displays samples in the ACTIVE SESSION PROFILE memory on the current node, as shown in Table 1.

Table 1 LOCAL_ACTIVE_SESSION columns

Name

Type

Description

sampleid

bigint

Sample ID

sample_time

timestamp with time zone

Sampling time

need_flush_sample

Boolean

Specifies whether the sample needs to be flushed to disks.

databaseid

oid

Database ID

thread_id

bigint

Thread ID

sessionid

bigint

Session ID

start_time

timestamp with time zone

Start time of a session

event

text

Event name

lwtid

integer

Lightweight thread ID of the current thread.

psessionid

bigint

Parent thread of the streaming thread.

tlevel

integer

Level of the streaming thread, which corresponds to the level (id) of the execution plan

smpid

integer

Concurrent thread ID in SMP execution mode

userid

oid

ID of a session user

application_name

text

Name of an application

client_addr

inet

IP address of a client

client_hostname

text

Name of a client

client_port

integer

TCP port number used by a client to communicate with the backend

query_id

bigint

Debug query ID.

unique_query_id

bigint

Unique query ID.

user_id

oid

User ID in the key of the unique query

cn_id

integer

CN ID. On a DN, this parameter indicates the ID of the node that delivers the unique SQL statement, that is, the value of cn_id in the key of the unique query.

unique_query

text

Standardized text string of the unique SQL statement

locktag

text

Information of a lock that the session waits for, which can be parsed using locktag_decode

lockmode

text

Mode of a lock that the session waits for

block_sessionid

bigint

Blocks a session from obtaining the session ID of a lock if the session is waiting for the lock.

final_block_sessionid

bigint

ID of the blocked session at the source end

wait_status

text

Provides more details about an event column.

global_sessionid

text

Global session ID

xact_start_time

timestamp with time zone

Start time of the transaction

query_start_time

timestamp with time zone

Time when the statement starts to be executed

state

text

Current statement state

The value can be active, idle in transaction, fastpath function call, idle in transaction (aborted), disabled, or retrying.

event_start_time

timestamp with time zone

Start time of a wait event.

current_xid

xid

Current transaction ID.

top_xid

xid

Top-level transaction ID.