Oracle GoldenGate provides MEASFLS and MEASRPT to assist in determining sizing and configuration parameters for TMF and non-TMF based data synchronization. MEASFLS gathers statistics using Measure. MEASRPT interprets Measure statistics and produces a report that assists in the sizing process.
This chapter includes the following sections:
The function of MEASFLS is to start Measure processes that collect data about file I/O at specified intervals.
MEASFLS uses a parameter file to identify the list of files to measure, the reporting period, and other parameters. Create or edit the parameter file using the NonStop editor.
Run MEASFLS using the following syntax.
TACL> RUN MEASFLS /IN parameter_file/
MEASFLS initiates activity measurements. After MEASFLS finishes, wait for Measure activity to complete before running MEASRPT.
Example 12-1 MEASFLS Parameter File
-- -- MEASFLS Parameters -- START 2010-03-07 01:00 DURATION 7 DAYS INTERVAL 1 HOUR MEASFILES $DATA2.MEASDAT.MDAT PURGEMEASFILES ON WILDCARD $*.*.*
This example parameter file:
Runs Measure for seven days with a reporting interval of one hour, starting at March 7, 2010 at 01:00.
Gathers statistics for all files on the system every hour.
Extracts Measure data into files named $DATA2.MEASDAT.MDATnn.
Purges the previous measurement using the same Measure data files.
The MEASRPT report outputs the statistics generated with MEASFLS and Measure. These statistics are output during individual intervals as cumulative totals, identifying both peak and summary activity levels.
Many of the statistics can be displayed as either absolute numbers or on a per-second basis. See the MEASRPT parameter REPORTRATE in Reference for Oracle GoldenGate on HP NonStop Guardian.
| Statistic Category | Description |
|---|---|
|
CPU Busy |
Shows the average percent busy across processors during each period and over the total period measured. The report includes a peak utilization rate. These figures provide insight into the current utilization rates on the system and can be used to project utilization rates after Oracle GoldenGate is installed and running. |
|
Top 10 Peak Periods |
This section of the report displays the top 10 most active periods on the system as a whole, according to three criteria.
These numbers, especially the last two, provide an estimate of the communications bandwidth requirements. |
|
Top 10 Peak Files |
This section of the report displays the most active files over a single interval. For non-TMF applications, distributing files across multiple Logger processes becomes a matter of figuring out the total number of I/Os a single Logger can handle, then assigning files to each Logger accordingly. This section of the report helps identify how files might be assigned to multiple trails and audit trails, and downstream, over different communications channels. |
|
Statistics Across All Files |
This section of the report displays a summary of activity across all files for each interval of the report. These statistics point out peak I/O activity, and aid in sizing bandwidth requirements. This section also reports the peak byte generation over the intended retention period. Use this to size total disk space requirements for an extended outage on the target system. You can alter the intended retention period with the MEASRPT |
|
Statistics By File |
This section of the report displays statistics for each interval for every file extracted and selected for the report. You can exclude specific files from the report (with the Statistics for each file include cache hit rate, file busy figures, bytes generated, and the number of operations. Generally, Top 10 Peak Files provides enough information for distributing the load effectively, but occasionally more detail is desired. You can limit statistics by file to the most active files ( |
|
Statistics by Program |
This section of the report displays statistics for each interval for every program that updates files specified in the report (If a program updates files excluded from the report, those statistics are not included in the report either.) Understanding which programs are causing the most updates can be useful for spotting opportunities to eliminate certain delivery activity. For example, a You can exclude specific programs from the report (using the You can limit statistics by program to the most active programs ( |
|
TMF Transaction Report |
This section of the report displays statistics regarding TMF transactions during each interval and in total. This section also displays the programs that began the most transactions and programs that aborted the most transactions. |
MEASRPT outputs statistics gathered by MEASFLS that are pertinent to the Oracle GoldenGate sizing process.
MEASRPT uses a parameter file to identify the list of files to report about, activity reporting criteria, the reporting period, and other parameters. Create or edit the parameter file using the NonStop editor.
Run MEASRPT from TACL using the following syntax.
TACL> RUN MEASRPT /IN param_file, OUT report_file/
Example 12-2 MEASRPT Parameter File
-- -- MEASRPT Parameters -- MEASFILES $DATA2.MEASDAT.MDAT INCLUDEFILE $*.GGSDAT.* GETSQL OFF GETAUDITED OFF LISTLIMIT 30
The example parameter file:
Specifies that Measure data extracted into files named $DATA2.MEASDAT.MDATnn be used for the report
Reports file activity for files in subvolume GGSDAT on any volume, including secondary partitions (even though more data may have been extracted)
Ignores (by default) alternate key files, SQL indexes, and NonStop files (codes 1-1000)
Explicitly omits SQL tables from the report
Omits audited files from the report
Limits detailed output to the 30 most active files and programs