{ "date": "2015-03-02T12:10:37", "slug": "query-the-enterprise-manager-collected-metrics", "link": "https://www.dbi-services.com/blog/query-the-enterprise-manager-collected-metrics/", "title": { "rendered": "Query the Enterprise Manager collected metrics" }, "content": { "rendered": "

By Franck Pachot

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\nEnterprise Manager (Cloud Control for example) gathers a lot of metrics. You can display them from the GUI, but you can also query the SYSMAN views directly. Today, I wanted to get the history of free space in an ASM disk group for the previous week. Here is how I got it.
\nEnterprise Manager metrics are aggregated in MGMT_METRICS_1HOUR (granularity 1 hour, retention 1 month) and MGMT_METRICS_1DAY (granularity 1 day, retention 1 year). But the detailed collected values are kept 7 days in MGMT_METRICS_RAW. This is what I ‘ll query.
\nAll that is in the SYSMAN schema:

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SQL> alter session set current_schema=SYSMAN;
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The metrics are related to a target and a metric. Let’s find them.

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target

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First, let’s have a look at all available the targets types in MGMT_TARGETS:

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select distinct target_type,type_display_name from mgmt_targets order by 1;
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TARGET_TYPETYPE_DISPLAY_NAME
clusterCluster
compositeGroup
hasOracle High Availability Service
hostHost
j2ee_applicationApplication Deployment
metadata_repositoryMetadata Repository
microsoft_sqlserver_databaseMicrosoft SQL Server
oracle_apacheOracle HTTP Server
oracle_beaconBeacon
oracle_databaseDatabase Instance
oracle_dbsysDatabase System
oracle_em_serviceEM Service
oracle_emdAgent
oracle_emrepOMS and Repository
oracle_emsvrs_sysEM Servers System
oracle_homeOracle Home
oracle_ias_farmOracle Fusion Middleware Farm
oracle_listenerListener
oracle_omsOracle Management Service
oracle_oms_consoleOMS Console
oracle_oms_pbsOMS Platform
osm_clusterCluster ASM
osm_instanceAutomatic Storage Management
rac_databaseCluster Database
weblogic_domainOracle WebLogic Domain
weblogic_j2eeserverOracle WebLogic Server
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I want to see ASM metrics for my RAC cluster. The display name ‘Cluster ASM’ has the internal type as ‘osm_cluster’ (yes, it was initially called Oracle Storage Management).

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Then here are all the targets I have for that target type:

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SQL> select target_name,target_type,target_guid from mgmt_targets where target_type='osm_cluster';
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TARGET_NAMETARGET_TYPETARGET_GUID
+ASM_xxzhorac1osm_clusterB8A5A42E2F8F6FCF6CF9FEB082B4CD79
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In SYSMAN schema, we have GUID identifiers.

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metric

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Then, for each target type, there is a large number of metrics referenced in MGMT_METRICS:

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select distinct target_type,metric_name,metric_label,metric_column,column_label,metric_guid \nfrom mgmt_metrics\nwhere target_type='osm_cluster' and metric_label like 'Disk Group%'\norder by target_type,metric_name,metric_column;
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METRIC_NAMEMETRIC_LABELCOLUMN_LABEL
DiskGroup_Target_ComponentDisk Group Target Component
DiskGroup_Target_ComponentDisk Group Target ComponentDisk Group Name
DiskGroup_Target_ComponentDisk Group Target ComponentDisk Count
DiskGroup_UsageDisk Group Usage
DiskGroup_UsageDisk Group UsageDisk Group Name
DiskGroup_UsageDisk Group UsageDisk Group Free (MB)
DiskGroup_UsageDisk Group UsageDisk Group Used %
DiskGroup_UsageDisk Group UsageUsed % of Safely Usable
DiskGroup_UsageDisk Group UsageSize (MB)
DiskGroup_UsageDisk Group UsageRedundancy
DiskGroup_UsageDisk Group UsageDisk Group Usable Free (MB)
DiskGroup_UsageDisk Group UsageDisk Group Usable (MB)
asm_diskgroupDisk Groups
asm_diskgroupDisk GroupsAllocation Unit Size (MB)
asm_diskgroupDisk GroupsDisk Count
asm_diskgroupDisk GroupsDisk Group
asm_diskgroupDisk GroupsRedundancy
asm_diskgroupDisk GroupsSize (GB)
asm_diskgroupDisk GroupsContains Voting Files
asm_diskgroup_attributeDisk Group Attributes
asm_diskgroup_attributeDisk Group AttributesAttribute Name
asm_diskgroup_attributeDisk Group AttributesDisk Group
asm_diskgroup_attributeDisk Group AttributesValue
diskgroup_imbalanceDisk Group Imbalance Status
diskgroup_imbalanceDisk Group Imbalance StatusDisk Group Imbalance (%) without Rebalance
diskgroup_imbalanceDisk Group Imbalance StatusDisk Maximum Used (%) with Rebalance
diskgroup_imbalanceDisk Group Imbalance StatusDisk Minimum Free (%) without Rebalance
diskgroup_imbalanceDisk Group Imbalance StatusDisk Count
diskgroup_imbalanceDisk Group Imbalance StatusDisk Group
diskgroup_imbalanceDisk Group Imbalance StatusActual Imbalance (%)
diskgroup_imbalanceDisk Group Imbalance StatusActual Minimum Percent Free
diskgroup_imbalanceDisk Group Imbalance StatusRebalance In Progress
diskgroup_imbalanceDisk Group Imbalance StatusDisk Size Variance (%)
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Ok there is a lot of metrics.
\nIf you want more information about them, just go to the Enterprise manager documentation. I’m interrseted about disk group rebalancing and documentation for Disk Group Imbalance Status metrics is here.

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collected values

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Now let’s put that together and join to MGMT_METRICS_RAW where I’m interested in the ‘U90’ diskgroup:

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select \n to_char(collection_timestamp,'dd-mon-yyyy') day,to_char(collection_timestamp,'hh24:mi') hour\n ,metric_label||' - '||column_label label,key_value key,value\nfrom\n(select distinct target_name,target_type,target_guid from mgmt_targets where target_type='osm_cluster')\njoin (\n select distinct \n  target_type,metric_name,metric_label,metric_column,column_label,short_name,metric_guid \n from mgmt_metrics\n) using(target_type)\njoin mgmt_metrics_raw using(target_guid,metric_guid)\nwhere key_value = 'U90' and collection_timestamp>sysdate-8\norder by collection_timestamp desc,metric_label,column_label,key_value\n;
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DAYHOURLABELKEYVALUE
02-mar-201515:43Disk Group Usage – Disk Group Free (MB)U90939137
02-mar-201515:43Disk Group Usage – Disk Group Usable (MB)U901279980
02-mar-201515:43Disk Group Usage – Disk Group Usable Free (MB)U90939137
02-mar-201515:43Disk Group Usage – Disk Group Used %U9026.629
02-mar-201515:43Disk Group Usage – Size (MB)U901279980
02-mar-201515:43Disk Group Usage – Used % of Safely UsableU9026.629
02-mar-201515:39Disk Group Imbalance Status – Actual Imbalance (%)U900.164381953
…
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I usually get the result from SQL Developer and export it as html. This is what I’ve pasted above. And it’s easy to open it with Excel and get a nice pivot chart from it:

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\"b2ap3_thumbnail_CaptureEM-Metrics.JPG\"

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In my case, I was interested by the available free space in my diskgroup disks during the week. A disk has been added on 24-feb 20:00 but the re-balance hanged for 24 hours. The blue area is the minimum free space (among all the disgroup disks – which have the same size) and the grey part is the size of the newly added disk that has to be re-balanced among all disks.

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But the goal of this post is only to show how to get collected statistics:

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I need that very rarely, but it can help to analyze something that happened in the past.

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