Well, from what I've read, SSDs don't necessarily provide very high random write throughput over time. You should do some further research into how they operate to understand what the issues may be. In any case, the much more important information is what IO pattern(s) are occuring on your storage media and what the controller is doing with it. You still haven't eliminated the possibility that the controller/driver is somehow not helping. You should also graph at least read/write IO count and byte counts; investigate what is going on. 2c, Adrian 2009/8/2 smaugadi <adi@xxxxxxxxxxxx>: > > Dear Waitman, > > > Testing the SSD drive, before installing it on the squid, showed huge > performance advantage in IOPS, read/write. So, I thought that this will > solve the problems I had with HDD. > But it was not so, look at this output: > 12:39:35 PM CPU %user %nice %sys %iowait %irq %soft %steal > %idle intr/s > 12:39:37 PM all 2.87 0.00 2.25 44.44 0.12 3.50 0.00 > 46.82 11666.50 > 12:39:37 PM 0 0.00 0.00 0.00 0.00 0.50 4.50 0.00 > 95.00 4764.00 > 12:39:37 PM 1 0.00 0.00 0.50 4.98 0.00 2.49 0.00 > 92.04 2097.50 > 12:39:37 PM 2 11.56 0.00 8.54 76.88 0.00 3.02 0.00 > 0.00 1977.50 > 12:39:37 PM 3 0.50 0.00 0.00 95.52 0.50 3.48 0.00 > 0.00 2827.50 > > This is a moment before the system went down, the IO is up high. > > > Waitman Gobble-2 wrote: >> >> >> smaugadi wrote: >>> Dear ALL, >>> We have a squid server with high volume of traffic, 200 – 300 MB
