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-rw-r--r--doc/mrbconf/README.md12
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/mrbconf/README.md b/doc/mrbconf/README.md
index 813b80839..14cd23834 100644
--- a/doc/mrbconf/README.md
+++ b/doc/mrbconf/README.md
@@ -81,3 +81,15 @@ will be defined as `mrb_int`.
* Default value is 100.
* Ignored when `MRB_GC_FIXED_ARENA` isn't defined.
* Defines fixed GC arena size.
+
+## Memory pool configuration.
+
+`POOL_ALIGNMENT`
+* Default value is `4`.
+* If you're allocating data types that requires alignment more than default value define the
+largest value of required alignment.
+
+`POOL_PAGE_SIZE`
+* Default value is `16000`.
+* Specifies page size of pool page.
+* Smaller the value is increases memory overhead.