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Date: Wed, 1 May 2013 08:12:14 +0530 From: Subranshu Patel <spatel.ml@...il.com> To: "Theodore Ts'o" <tytso@....edu> Cc: linux-ext4@...r.kernel.org Subject: Re: fsck memory usage > What version of e2fsprogs are you using? There has been a number of > changes made to improve both CPU and memory utilization in more recent > versions of e2fsprogs. I am using version 1.41.12 >> Then I performed metadata corruption - 10% of the files, 10% of the >> directories and some superblock attributes using debugfs. Then I >> executed fsck to find a memory usage of around 8GB, a much larger >> value. > It's going to depend on what sort of metadata corruption was suffered. > If you need to do pass 1b/c/d fix ups, it will need more memory. > That's pretty much unavoidable, but it's also not the common case. In > most use cases, if those cases require using swap, that's generally OK > if it's the rare case, and not the common case. That's why it's not > something I've really been worried about. I used the sar command for tracking memory usage. The total memory usage reported by sar command is around 8GB, but it includes the buffer and cache memory. memused = 8GB buffer = 6.7GB cache = negligible (some MBs) So I think the effective memory usage will be 1.3GB (8 - 6.7). So the memory reported under buffer and cache is available for use (if any other process requires it). Please correct my understanding. -- Subranshu -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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