How do I tweak OS/2 Warp for maximum performance?
For advice on tuning OS/2 Warp (including information on running games) please consult the documents located in the Information folder. Also, several tools have been developed to help tune OS/2 Warp for performance, notably:
Here are some basic steps you can take to improve the performance of your OS/2 Warp PC:
FastLoad will not provide any benefit if (a) you have enabled the "Separate session" feature for your Windows application(s); (b) your FastLoad session is set for a different mode than your Windows application(s). In other words, if your FastLoad session is set for Enhanced mode, the Windows applications you start from the OS/2 Warp desktop must also be set to Enhanced mode. You can adjust the FastLoad mode setting by using the Win-OS/2 settings button in the Win-OS/2 Setup notebook. The mode setting for a Windows application is controlled from the settings notebook for that application. If the mode settings are not identical, FastLoad can actually hamper performance.
As a rule of thumb, the total size of your disk caches (combined) should be about 10% of your PC's available memory. For example, if you have a system with 12 MB of memory, then you can spare a little over a megabyte (1024K) for disk cache. The cache sizes for the three most popular OS/2 Warp file systems are controlled using the following lines in CONFIG.SYS:
DISKCACHE=xxxx[,...] IFS=[...]HPFS.IFS /CACHE:yyyy [...] IFS=[...]CDFS.IFS /C:zz [...]
(for FAT, HPFS, and CD-ROM, respectively). The "[...]" notation above indicates that additional, optional parameters are available for these lines. Replace "xxxx" or "yyyy" with the size of the cache you would like (in Kilobytes). For example, to set a cache size of 1 MB for the FAT file system:
Replace "zz" with the size of the CD-ROM cache you wish to set, in 64K segments. For example, to set a cache size of 128K for the CD-ROM file system, use:
For more information on setting disk cache sizes, please refer to the online Command Reference.
(1.3) DOS and Windows Compatibility (2.3) Printer Support (5.7) Measuring Performance and Memory Usage