Displays cache usage statistics regarding metadata descriptors for indexes, objects, databases, and the kernel resource memory pool. sp_monitorconfig also reports statistics on auxiliary scan descriptors used for referential integrity queries, and usage statistics for transaction descriptors and DTX participants.
sp_monitorconfig "configname"[, "result_tbl_name"][, "full"]
is either all, or part of the configuration parameter name with the monitoring information that is being queried. Valid configuration parameters are listed in the “Usage” section. Specifying all displays descriptor help information for all indexes, objects, databases, and auxiliary scan descriptors in the server.
is the name of the table you create to save the stored procedure results. This is an optional parameter. If you pass a table name for result_tabl_name that does not already exist, sp_monitorconfig creates a table to hold the result set.
returns a set of values for the configname that you specify. The values are:
config_val – reports the configured value
system_val – reports the systems default value when there’s novalue configured
total_val – reports the actual value used
Shows all items that are open:
sp_monitorconfig "open"
Configuration option is not unique. option_name config_value run_value ----------------------------- ---------- ---------- number of open databases 12 12 number of open objects 500 500 curread change w/ open cursors 1 1 open index hash spinlock ratio 100 100 number of open indexes 500 500 open index spinlock ratio 100 100 open object spinlock ratio 100 100 number of open partitions 500 500
Shows the status for all configurations:
sp_monitorconfig "all" -------------
Usage information at date and time: May 6 2010 4:32PM. Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- additional network memory 1358436 809440 37.34 825056 0 NULL audit queue size 100 0 0.00 0 0 NULL disk i/o structures 256 0 0.00 29 0 NULL heap memory per user 4096 0 0.00 0 0 NULL . . . size of process object he 3000 0 0.00 0 0 NULL size of shared class heap 6144 0 0.00 0 0 NULL size of unilib cache 306216 816 0.27 816 0 NULL txn to pss ratio 400 0 0.00 0 0 NULL
Shows 61 active object metadata descriptors, with 439 free. The maximum used at a peak period since Adaptive Server was last started is 61:
sp_monitorconfig "open objects"
Usage information at date and time: Apr 22 2002 2:49PM. Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- number of open objects 439 61 12.20 61 0 NULL
You can then reset the size to 550, for example, to accommodate the 439 maximum used metadata descriptors, plus space for 10 percent more:
sp_configure "number of open objects", 330
Shows the maximum number of index metadata descriptors, which is 44:
sp_monitorconfig "open indexes"
Usage information at date and time: Apr 22 2002 2:49PM. Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- number of open indexes 556 44 7.33 44 0 NULL
You can reset the size to 100, the minimum acceptable value:
sp_configure "number of open indexes", 100
Shows the number of active scan descriptors as 30, though Adaptive Server is configured to use 200. Use the number of aux scan descriptors configuration parameter to reset the value to at least 32. A safe setting is 36, to accommodate the 32 scan descriptors, plus space for 10 percent more:
sp_monitorconfig "aux scan descriptors"
Usage information at date and time: Apr 22 2002 2:49PM. Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- number of aux scan descri 170 30 15.00 32 0 NULL
Adaptive Server is configured for five open databases, all of which have been used in the current session.
sp_monitorconfig "number of open databases"
Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- number of open databses 0 5 100.00 5 Yes NULL
However, as indicated by the Reuse_cnt column, an additional database needs to be opened. If all 5 databases are in use, an error may result, unless the descriptor for a database that is not in use can be reused. To prevent an error, reset number of open databases to a higher value.
Only 10.2 percent of the transaction descriptors are currently being used. However, the maximum number of transaction descriptors used at a peak period since Adaptive Server was last started is 523:
sp_monitorconfig "txn to pss ratio"
Usage information at date and time: Apr 22 2002 2:49PM. Name Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name -------------------- --------- --------- ------- ------- --------- ------------- txn to pss ratio 784 80 10.20 523 0 NULL
Using the optional parameter result_tbl_name to create a user table saves the sp_monitorconfig result to this table:
create table sample_table (Name varchar(35),Config_val int, System_val int, Total_val int, Num_free int, Num_active int, Pct_act char(6), Max_used int, Num_Reuse int, Date varchar(30))
create table sample_table (Name varchar(35), Config_val int, System_val int, Total_val int, Num_free int, Num_active int, Pct_act char(6), Max_Used int, Reuse_cnt int, Date varchar(30), Instance_Name varchar(35))
The name of the table created becomes the second parameter of sp_monitorconfig. Capture the values for number of locks and number of alarms in sample_table:
sp_monitorconfig "locks", sample_table sp_monitorconfig "number of alarms", sample_table
Display the values captured in sample_table:
select * from sample_table
Name Config_val System_val Total_val Num_free Num_active Pct_act Max_used Reuse_cnt Date Instance_Name ------------------- ----------- ---------- --------- --------- ---------- ------- -------- --------- ------------------- ------------------------ number of locks 5000 684 5000 4915 85 1.70 117 0 Aug 23 2006 6:53AM number of alarms 40 0 40 28 12 30.00 13 0 Aug 23 2006 6:53AM
The result set saved to the table accumulates until you delete or truncate the table.
If sample_table is in
another database, you must provide its fully qualified name in quotes.
Displays the configure_value, system_value, and run_value columns of all the configurations:
sp_monitorconfig "all", null, "full" go
Usage information at date and time: Mar 23 2004 5:15PM
Name Configure Value System Value Run Value Num_free Num_active Pct_act Max_Used Reuse_cnt Instance_Name ------------------------ ---------- ---------- ------- --------- ---------- ------- -------- --------- ------------------- additional network memory 0 2167876 2167876 1358436 809440 37.34 825056 0 NULL audit queue size 100 0 100 100 0 0.00 0 0 NULL disk i/o structures 256 0 256 256 0 0.00 29 0 NULL heap memory per user 4096 563 4096 4096 0 0.00 0 0 NULL kernel resource memory 4096 0 4096 3567 529 12.92 529 0 NULL max cis remote connection 0 100 100 100 0 0.00 0 0 NULL . . . size of shared class heap 6144 0 6144 6144 0 0.00 0 0 NULL size of unilib cache 0307032 307032 306216 816 0 .27 816 0 NULL txn to pss ratio 16 0 16 400 0 0.00 0 0 NULL
If the max cis remote connections configuration parameter has a config_value, the system_val reports a value of zero (0).
If you reconfigure a resource using a value that is smaller than the original value it was given, the resource does not shrink, and the Num_active configuration parameter can report a number that is larger than Total_val. The resource shrinks and the numbers report correctly when Adaptive Server restarts.
sp_monitorconfig displays cache usage statistics regarding metadata descriptors for indexes, objects, and databases, such as the number of metadata descriptors currently in use by the server.
sp_monitorconfig also reports the number of auxiliary scan descriptors in use. A scan descriptor manages a single scan of a table when queries are run on the table.
sp_monitorconfig monitors the following resources:
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The columns in the sp_monitorconfig output provide the following information:
num_free – specifies the number of available metadata or auxiliary scan descriptors not currently used.
num_active – specifies the number of metadata or auxiliary scan descriptors installed in cache (that is, active).
pct_active – specifies the percentage of cached or active metadata or auxiliary scan descriptors.
Max_Used – specifies the maximum number of metadata or auxiliary scan descriptors that have been in use since the server was started.
Reused – specifies
whether a metadata descriptor was reused in order to accommodate
an increase in indexes, objects, or databases in the server. The
returned value is Yes, No or NA (for
configuration parameters that do not support the reuse mechanism,
such as the number of aux scan descriptors).
Use the value in the Max_Used column as a basis for determining an appropriate number of descriptors; be sure to add about 10 percent for the final setting. For example, if the maximum number of index metadata descriptors used is 142, you might set the number of open indexes configuration parameter to 157.
If the Reused column states Yes,
reset the configuration parameter to a higher value. When descriptors
need to be reused, there can be performance problems, particularly
with open databases. An open database contains a substantial amount
of metadata information, which means that to fill up an open database,
Adaptive Server needs to access the metadata on the disk many times;
the server can also have a spinlock contention problem. To check
for spinlock contention, use the system procedure sp_sysmon.
See the Performance and Tuning Series: Monitoring Adaptive
Server with sp_sysmon. To find the current number of
indexes, objects, or databases, use sp_countmetadata.
To get an accurate reading, run sp_monitorconfig during a normal Adaptive Server peak time period. You can run sp_monitorconfig several times during the peak period to ensure that you are actually finding the maximum number of descriptors used.
result_tbl_name creates a table using the following syntax. All the result information is saved in this table, which returns no standard output.
create table table_name( Name varchar(35), Num_free int, Num_active int, Pct_act char(6), Max_Used int, Reuse_cnt int, Date varchar(30))
Some configuration parameter, such as number of sort buffers and txn to pss ratio, are dependent on the number of configured user connections, while other configuration parameters, such as max number of network listeners, are per engine.
The output of sp_monitorconfig uses the number of user connections and online engines to calculate the values for the columns num_free, num_active, pct_act and max_used.
The updates on the internal monitor counters are done without using synchronization methods because of performance reasons. For this reason, a multi-engine Adaptive Server under heavy load might report numbers in the sp_monitorconfig output that are not a completely accurate.
You might see the number of active locks as greater than 0 on an idle system. These “active” locks are reserved and used internally.
Only a system administrator can execute sp_monitorconfig.
Values in event and extrainfo columns from the sysaudits table are:
Event |
Audit option |
Command or access audited |
Information in extrainfo |
|---|---|---|---|
38 |
exec_procedure |
Execution of a procedure |
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System procedures sp_configure, sp_countmetadata, sp_helpconfig, sp_helpconstraint, sp_sysmon
