Caché Monitoring Guide - InterSystems Documentation

Monitoring Caché Using the Management Portal
Identifier
Total SMH Pages Used
Definition
Total directly allocated shared memory heap (SMH) and string table allocated SMH
memory, together with the total used/available memory in the static memory table
(SMT) and the general string table (GST); the number of 64-KB pages is displayed
parenthetically.
1.3 Monitoring Locks
Caché locks are created when a Caché process issues a Lock command on a Caché entity, such as a local or global variable,
as long as the entity is not already locked by another process. Entities need not exist in the database to lock them.
To display or delete locks, navigate to the [System] > [Locks] page from the Operations section of the Management Portal
home page. The table lists one row for each lock owner and lock waiter. If one lock is owned by more than one process,
each owner has its own row.
The Lock Table has the following column entries.
Column Heading
Owner
Mode/Count
Reference
Directory
System
Remove
Definition
The process ID of the process holding or waiting for the lock. Contains the client
system name if it is a remote lock.
Lock mode and count of the lock item. If the lock count is 1 the count is not displayed.
For details, see the Lock Modes table.
Lock reference string of the lock item (does not include the database name).
The database location of the lock item.
The system name of where the lock is located, if it is the local system the column is
blank.
If this lock is removable, this option along with the Remove all locks for process option
appears in the row. Click the appropriate option to remove the lock or remove all
locks for the process.
In most cases, the only time you need to remove locks is as a result of an application problem.
For a more in-depth description of the Lock command and its features, see the Lock entry of the Caché ObjectScript Reference
guide.
You may need to enlarge the size of the lock table if your system uses a large number of locks. You can do this using the
Management Portal:
1. Navigate to the [System] > [Configuration] > [Advanced Memory Settings] page.
2. In the locksiz (locksiz) row, click Edit.
3. In the locksiz box, update the amount of memory allocated on your system for locks (in bytes), and click OK.
The minimum is 65536; the maximum value depends on the value of gmheap (Generic Memory Heap Size). Increase
the heap size if you need more room for the lock table. Caché rounds up the value to the next multiple of 64 KB. The
default range is from 65536 – 1769472.
4. Click Save and restart Caché for this information to take effect.
The following table lists the possible values of the mode portion of the Mode/Count column.
8 Caché Monitoring Guide