search for: plummet

Is it possible to create an alternate list for the people who insist on spending their days posting long-winded political commentary and opinion? Maybe something like centos-offtopic? Reading the list has gone from "fun" status to "chore." Just a suggestion. Cheers, C

...p, but reception reliability in my specific installation was poor) I bit the bullet and put in a separate Hylafax server connected to my Asterisk box with a crossover cable, rolled up my sleeves, and stated making IAXmodems - 1 per user. I am at over 200 IAXmodem's, and my failure rate on faxes plummeted to about .8 % - more than comparable to a regular fax machine. AFAIC, Hylafax + IAXmodem is the way to go for anything serious, unless we are talking about thousands of users and thousands of faxes per day. I don't even know what could be scaled to that scenario and not be unmanageable.

m.roth at 5-cent.us wrote: > Mark Haney wrote: >> On 09/08/2017 09:49 AM, hw wrote: >>> Mark Haney wrote: > <snip> >>> >>> It depends, i. e. I can?t tell how these SSDs would behave if large >>> amounts of data would be written and/or read to/from them over extended >>> periods of time because I haven?t tested that. That isn?t the

On Aug 22, 2008, at 4:49 PM, John Regehr wrote: > Has anyone quantified the optimizations afforded by undefined signed > overflow? I'd expect that the benefits are minimal for most codes. In most cases, I agree. But for codes that depend heavily on dependence analysis, I would think that being conservative with index expressions would really kill any disambiguation capability and

I have a program called Messiah Studio. It licenses to your USB drive. Some people over on their forum have gotten it working under Wine but they go thru so many steps to do it that by the time they are done they are not sure which steps did the trick. So far all we have diduced is that you need Wine 1.3 and you need the drive mounted as low a level as possible. Here is what I have so far.

...small writes are added to the battery-backed cache on the card and the OS considers them complete.? However, on many cards, if the system writes data to the card faster than the card writes to disks, the cache will fill up, and at that point, the system performance can suddenly and unexpectedly plummet.? I've fun a few workloads where that happened, and we had to replace the system entirely, and use software RAID instead.? Software RAID's performance tends to be far more predictable as the workload increases. Outside of microbenchmarks like bonnie++, software RAID often offers much b...

...there are actually two major semantic effects tied to call boundaries. The first is that function return implicitly releases stack-allocated memory; the pathological case here is a recursive function that calls a helper with huge stack variables, where inlining the helper makes max recursion depth plummet. Currently the inliner makes some effort to mitigate this impact, but mostly by sharing allocas between different inlined functions. The second is that inlining changes the behavior of anything that wants to manually walk the call stack, and while most stack walkers don't rely on any frame-sp...

Ahh Mr Carbuyer ... you should have _specified_ you wanted tires with that new car We can still help you though, it will just be an extra $$ above the price we quoted you I understand the concept. I see it in many industries until a company comes along that cares about it's customers I still think that digium is the best buy (for the small scale stuff that I'm interested in anyway) ...

Hello, i have an 8 port sata-controller and i don''t want to spend the money for 8 x 750 GB Sata Disks right now. I''m thinking about an optimal way of building a growing raidz-pool without loosing any data. As far as i know there are two ways to achieve this: - Adding 750 GB Disks from time to time. But this would lead to multiple groups with multiple redundancy/parity disks. I

Jens Axboe <axboe at kernel.dk> writes: > On 2014-05-30 00:10, Rusty Russell wrote: >> Jens Axboe <axboe at kernel.dk> writes: >>> If Rusty agrees, I'd like to add it for 3.16 with a stable marker. >> >> Really stable? It improves performance, which is nice. But every patch >> which goes into the kernel fixes a bug, improves clarity, improves

Jens Axboe <axboe at kernel.dk> writes: > On 2014-05-30 00:10, Rusty Russell wrote: >> Jens Axboe <axboe at kernel.dk> writes: >>> If Rusty agrees, I'd like to add it for 3.16 with a stable marker. >> >> Really stable? It improves performance, which is nice. But every patch >> which goes into the kernel fixes a bug, improves clarity, improves

..._raw_spin_lock() whereas the disk-ext4 workload spent 57.8% of CPU time in _raw_spin_lock(). It can be seen that there wasn't too much difference in performance with low spinlock contention in the disk-xfs workload. With heavy spinlock contention, the performance of simple test-and-set lock can plummet when compared with the ticket and queue spinlocks. Unfair lock in a native environment is generally not a good idea as there is a possibility of lock starvation for a heavily contended lock. This patch adds a new configuration option for the x86 architecture to enable the use of unfair queue spin...

What you and so may others on this lise seem to forget is that Cisco is a company offering bsuiness products for businesses. Businesses typically pay by check and wire transfer, especially for items such as this. If you want home-user pay-by-credit-card service, buy products from Belkin's home line and similar. Oh...what's that? None of these cheesy Stocked-at-Costco hardware

...). But I hope that this means no metadata was hurt so far. 3) I''ve tried importing the pool in several ways (including normal and rollback mounts, readonly and "-n"), but so far all attempts led to to the computer hanging within a minute ("vmstat 1" shows that free RAM plummets towards the zero mark). I''ve tried preparing the system tunables as well: :; echo "aok/W 1" | mdb -kw :; echo "zfs_recover/W 1" | mdb -kw and sometimes adding: :; echo zfs_vdev_max_pending/W0t5 | mdb -kw :; echo zfs_resilver_delay/W0t0 | mdb -kw :; echo zfs_resilver...

Hi- I'm new to Gluster, but am trying to get it set up on a new compute cluster we're building. We picked Gluster for one of our cluster file systems (we're also using Lustre for fast scratch space), but the Gluster performance has been so bad that I think maybe we have a configuration problem -- perhaps we're missing a tuning parameter that would help, but I can't find

Hi All, after looking around for info on XFS(the filesystem) and its use on CentOS and/or RHEL 4. There seems to be a lot of noise about 4K Stacks (especially on linux-xfs at oss.sgi.com). So what is the best way to get XFS working with CentOS 4.3 ? And not have something like this happening. A quote from the xfs list at sgi >On Tue, 18 Jul 2006 at 10:29am, Andrew Elwell wrote >

So I have this dual 16-core Opteron Dell R715 with 128G of RAM attached to a SuperMicro disk enclosure with 45 2TB Toshiba SAS drives (via two LSI 9200 controllers and MPxIO) running OpenIndiana 151a4 and I''m occasionally seeing a storm of xcalls on one of the 32 VCPUs (>100000 xcalls a second). The machine is pretty much idle, only receiving a bunch of multicast video streams and

The poor interaction between exception handling and inlining in LLVM is one of the main motivations for the new exception handling models proposed recently. Here I give my analysis of the origin of the problem in the hope of clarifying the situation. Soon after dwarf exception handling was implemented in LLVM, I noticed that some programs would fail when compiled at -O3, for example the

...and does see its fair share of I/O, while the Solaris NFS share is only mounted on this one client.) Alright, so what''s my beef? Well, here''s the fun part: when I try to actually use this NFS share as my home directory (as I do with the IRIX NFS mount), then somehow performance plummets. Reading my inbox (~/.mail) will take around 20 seconds (even though it has only 60 messages in it). When I try to run ''ktrace -i mutt'' with the ktrace output going to the NFS share, then everything crawls to a halt. While that command is running, even a simple ''ls -la...

OK, I know that there''s been some discussion on this before, but I''m not sure that any specific advice came out of it. What would the advice be for supporting a largish number of users (10,000 say) on a system that supports ZFS? We currently use vxfs and assign a user quota, and backups are done via Legato Networker. >From what little I currently understand, the general