Caché Monitoring Guide - InterSystems Documentation

10
Monitoring Caché Mirroring Performance
This chapter describes the tools that are provided to monitor mirrors:
• Using the Mirror Monitor
• Using the ^MIRROR Utility
10.1 Using the Mirror Monitor
You can monitor mirrors through the [System] > [Mirror Monitor] page from either failover member or any async members.
The displayed information varies slightly depending on the member on which you run the mirror monitor:
• Mirror Monitor on Failover Members
• Mirror Monitor on Async Members
10.1.1 Mirror Monitor on Failover Members
When displayed from a failover member, the mirror monitor displays the following summary information:
• Mirror name.
• Failover member names, superserver addresses (which are used by external systems to communicate with failover
members), and mirror private addresses (which are used by the failover members to communicate with each other).
It also displays tables providing the following detailed information:
• Status of all mirror members (failover and async), including the member names, current role and status of each member,
and database latency information.
• Mirrored databases, including the database names, location (directory) of the database, mirror status, and links to let
you perform the following actions:
– Active/Activate — Active indicates the mirrored database is in the correct directory on the correct system. Typically,
Activate is displayed briefly for mirrored databases on a backup failover member or async members when the
database is being restored from a backup or being copied from another mirror member.
– Caught up/Catchup — Caught up indicates the mirrored database is up to date. Typically, on the primary failover
member, Catchup indicates the mirrored database is read-only (because mirroring cannot determine if it is up to
date). On the backup failover member, Catchup typically indicates the mirrored database is out of date, that mir-
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