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-rw-r--r--docs/mllib-collaborative-filtering.md3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/mllib-collaborative-filtering.md b/docs/mllib-collaborative-filtering.md
index b8f0566d87..5c33292aaf 100644
--- a/docs/mllib-collaborative-filtering.md
+++ b/docs/mllib-collaborative-filtering.md
@@ -21,7 +21,8 @@ following parameters:
* *numBlocks* is the number of blocks used to parallelize computation (set to -1 to auto-configure).
* *rank* is the number of latent factors in the model.
-* *iterations* is the number of iterations to run.
+* *iterations* is the number of iterations of ALS to run. ALS typically converges to a reasonable
+ solution in 20 iterations or less.
* *lambda* specifies the regularization parameter in ALS.
* *implicitPrefs* specifies whether to use the *explicit feedback* ALS variant or one adapted for
*implicit feedback* data.