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Answer by jcisio for High disk I/O when cache is used?
After a few days, now I want to come back with some graphs. The change improves much that situation. It reduces everything, except the IO service time (I think it's because there is no longer trivial...
View ArticleAnswer by cyberx86 for High disk I/O when cache is used?
If you use file-backed memory mapping (e.g. apc.mmap_file_mask=/tmp/apc.XXXXXX) you might see elevated I/O. Try setting apc.mmap_file_mask to use shared memory (e.g. /apc.shm.XXXXXX) or to /dev/zero...
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High disk I/O when cache is used?
A few days ago I noticed a disk I/O wait and disk activity drop (which was great). Then I also notice that my cache was full(*) and fragmented. Then I flushed cache. After that, disk latency and disk...
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