Originally posted by hax0r
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And like Michael pointed:
The very significant drop in PostgreSQL's performance in the Linux 2.6.32 kernel with default options can be attributed to this lone Git commit that is for a fix to address cache flushing in ext4_sync_file for the EXT4 file-system. This commit improves data integrity in the event of a power loss or other problem, but carries a high disk performance penalty.
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