How to Set MEMSIZE in SAS?

proc options option=memsize; run; Setting MEMSIZE to 0 is used as a test that can determine a good value to set for MEMSIZE. To determine the optimal setting of MEMSIZE, execute a SAS procedure or DATA step with the FULLSTIMER option and MEMSIZE set to 0.

What is real time and CPU time in SAS?

Real Time is the actual, real world, time that the step takes to run and will be the same as if you timed it with a stopwatch (not possible as you won’t know the precise moment the step starts and stops). CPU Time is the amount of time the step utilises CPU resources.

How to increase memory in SAS?

System Options You can use the MEMSIZE= system option to increase the amount of memory available to SAS and therefore decrease processing time. By increasing memory, you reduce processing time because the amount of time spent on paging, or reading pages of data into memory, is reduced.

How can I improve my SAS performance?

1) Read only data that is needed from external data files. 2) Minimize the number of times a large dataset is read by subsetting in a single DATA step. 3) Use KEEP= or DROP= data set options to retain only desired variables. 4) Use WHERE statements to subset data.

Where is the SAS configuration file?

The default configuration location is c:\program files\SASHome\SASFoundation\9.4\nls\en\sasv9. cfg. SAS requires a configuration file, so you must use a SAS configuration file regardless of whether you are using interactive or batch mode.

Does SAS use Multiplecores?

SAS does use multiple cores in some of it’s procedures eg. PROC SORT, PROC SQL (order by and group by) and others. The use of parallel execution was introduced with SAS version 9. It is possible to test the use and impact of executing SAS using multiple cores in parallel by using the OPTION NOTHREADS.

What is CPU real time data?

CPU time (or process time) is the amount of time for which a central processing unit (CPU) was used for processing instructions of a computer program or operating system, as opposed to elapsed time, which includes for example, waiting for input/output (I/O) operations or entering low-power (idle) mode.

How can I make SAS code faster?

To improve the performance of a SAS job, we must reduce the number of times SAS accesses disk or tape devices. We can reduce the number of data accesses by processing more data each time a device is accessed by setting the BUFNO=, BUFSIZE=, CATCACHE=, and COMPRESS= system options.

Does SAS use RAM?

SAS recommends that you allocate at least 4 cores for optimal performance. The minimum required amount of RAM for the Programming Runtime is 4 GB. SAS recommends that you allocate at least 16 GB of RAM, or 4 GB for each CPU core.

How do I create an Autoexec in SAS?

To create an autoexec file, follow these steps:

1. Use any text editor to write SAS statements into a CMS file. If you use SAS as the filetype, then you will not need to specify the filetype in the AUTOEXEC= system option.
2. Type in the SAS statements that you want to include.
3. Save the new autoexec file.

What is SAS configuration file?

A configuration file contains SAS system options that are set automatically when you invoke SAS. the system configuration file, which is used by all users at your site by default. Your on-site SAS support personnel maintain the system configuration file for your site.

Is SAS single threaded?

A SAS DATA step (a DATA step that is not executing in the CAS server) always runs in a single thread.

What does memsize mean in SAS 9.4?

SUMSIZE=0 Specifies a limit on the amount of memory that is available for data summarization procedures when class variables are active. MAXMEMQUERY=0 Specifies the maximum amount of memory that is allocated for procedures. MEMBLKSZ=16777216 Specifies the memory block size for Windows memory-based libraries.

Where do I put sas.exe-memsize-4g file?

When running: sas.exe -memsize 4G Or by putting -memsize 4G in your sasv9.cfg (there’s a complicated search algorithm for sasv9.cfg files, but you can put one in the directory you invoke SAS from). If you’re using SAS EG or SAS EM in client-server environment, that’s something your administrator must configure.

What does realmemsize = 0 mean in SAS?

MEMSIZE=2147483648 Specifies the limit on the amount of virtual memory that can be used during a SAS session. REALMEMSIZE=0 Specifies the amount of real memory SAS can expect to allocate. NOTE: PROCEDURE OPTIONS used (Total process time): real time 0.01 seconds cpu time 0.01 seconds

How to reset memory management in SAS 9.4?

Go to Start→All Programs→SAS then right-click on SAS 9.4 (English) Select Send to→Desktop to create a shortcut. Go to the Desktop, right-lick on the SAS shortcut, then open Properties. Modify the Target.