扩展事件的会话定义存储在哪里？

Question

是 msdb、resource、master 还是 local？如果我备份我运行 XE 的本地数据库，我是否也会备份我的会话？系统表中是否也存储了任何元数据？ 谢谢大家。

Answer 1

您可以从各种扩展的 DMV 中检索它们。例如，下面的查询将返回一堆关于扩展事件的信息。包括一些被注释掉的过滤器：

-- Extended Event Packages
select
    name,
    guid,
    description
from sys.dm_xe_packages
where (capabilities is null or capabilities & 1 = 0) -- ignore private packages for SQL Server internal use

-- Events
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'event'
--and o.name like 's%'

-- Event targets
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'target'

-- Predicate sources
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'pred_source'

-- Predicate comparators
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'pred_compare'

-- Maps
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'map'

-- Types
select
    p.name as package_name,
    o.name as source_name,
    o.description
from sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and o.object_type = 'Type'

-- Event columns
select
    o.name as [event],
    oc.name as column_name,
    oc.column_type as column_type,
    oc.column_value as column_value,
    oc.description as column_description
from
    sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
    inner join sys.dm_xe_object_columns as oc
        on o.name = oc.object_name
        and o.package_guid = oc.object_package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and (oc.capabilities is null or oc.capabilities & 1 = 0)
and o.object_type = 'event'
--and o.name like '%lock%'
order by event, column_name


-- Configurable Event Columns
-- These elements are optional and usually not present in event output.
-- They can be enabled as needed.
select
    o.name as [event],
    oc.name as column_name,
    oc.column_type as column_type,
    oc.column_value as column_value,
    oc.description as column_description
from
    sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
    inner join sys.dm_xe_object_columns as oc
        on o.name = oc.object_name
        and o.package_guid = oc.object_package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and (oc.capabilities is null or oc.capabilities & 1 = 0)
and o.object_type = 'event'
--and o.name = 'file_write_completed'
and oc.column_type = 'customizable'

-- Configurable options
select
    oc.name as column_name,
    oc.column_id,
    oc.type_name,
    oc.capabilities_desc,
    oc.description
from
    sys.dm_xe_packages as p
    inner join sys.dm_xe_objects as o
        on p.guid = o.package_guid
    inner join sys.dm_xe_object_columns as oc
        on o.name = oc.object_name
        and o.package_guid = oc.object_package_guid
where
    (p.capabilities is null or p.capabilities & 1 = 0)
and (o.capabilities is null or o.capabilities & 1 = 0)
and (oc.capabilities is null or oc.capabilities & 1 = 0)
and o.object_type = 'target'
--and o.name = 'file_write_completed'
and oc.column_type = 'customizable'

-- Map Values
select
    name,
    map_key,
    map_value
from sys.dm_xe_map_values
where 1 = 1
--and name = 'wait_types' 
--and map_value like 'lck%'

Answer 2

经过一番挖掘后，我发现会话的定义存储在主数据库中（考虑到它是有道理的，因为会话是在服务器级别定义的）。

备份此数据库将备份您创建的会话，但这不是恢复它们的最简单方法。您可能最好导出会话并将它们保存为模板，或者编写脚本并将它们保存在安全的地方。