Slowdown after a memory expansion
Support knowledgebase (ram_cache)
Applies to
SuSE Linux: All versions
Symptom:
The computer is slower after a memory expansion.
Cause:
Some old boards or their cache controller can only cache an specific
memory area. Mostly it is limited to 16MB. Since Linux uses the
entire available memory area, memory accesses outside the cacheable area
are really slow.
Solution:
Should your board e.g. only have available 128kB cache and you can expand
this to 256 kB, this can be the solution. Unfortunately not always,
because some cache controllers are buggy and a cache too big causes problems.
Keywords: RAM, CACHE
SDB-ram_cache, Copyright SuSE Linux AG, Nürnberg, Germany
- Version: 02. Apr 1997
SuSE Linux AG - Last generated: 10. Mai 2002 by sdb (sdb_gen 1.40.0)