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• How to stop Firefox on an SSD from freezing when using the search box or submitting a form?

  - by sblair

  Firefox usually freezes for about a second whenever I search for something from the toolbar search box, when submitting a form, or when clearing the search box history. I suspect it has something to do with the auto-complete feature. Using Windows 7's Resource Monitor, the problem seems to be from the file: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\formhistory.sqlite-journal I believe this is a temporary file which caches database writes. The following screenshot shows the very high response times from six different searches, and that the queue length on drive C shoots off the scale: My Firefox profile is on an Intel X25-M G2 SSD. The problem doesn't seem to occur if I create a new profile on a hard disk drive. However, I'd like to know why the problem exists on the SSD in the first place (because it's an annoying problem which contradicts the reason I bought an SSD, and it might happen with other applications too), and how to prevent it. It still occurs if Firefox is started in safe mode, and with the recent beta versions. Updates: VACUUMing the Firefox profile databases does not help with this problem. The SSD Optimizer in the Intel SSD Toolbox does not help either.

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• CPU and HD degradation on sourced based Linux distribution

  - by danilo2

  I was wondering for a long time if source based Linux distributions, like Gentoo or Funtoo are "destroying" your system faster than binary ones (like Fedora or Debian). I'm talking about CPU and hard drive degradation. Of course, when you're updating your system, it has to compile everything from source, so it takes longer and your CPU is used at hard conditions (it is warmer and more loaded). Such systems compile hundreds of packages weekly, so does it really matter? Does such a system degrade faster than binary based ones?

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• MySQL maintenance - how to clear the buffer?

  - by Dougal

  We have a server running our web app (PHP / MySQL) which is SLOW. My predecessor says that: "We use to do database maintenance, which use to clear the buffer, cached and unwanted variables." And I wonder what on earth he means with that statement? Does he mean a simple optimize of the tables? Or the query cache? I understand MySQL but don't really know what he is describing. I would appreciate any pointers. Thanks.

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• Why such a dramatic difference in wireless router max. simultaneous connections?

  - by Jez

  Recently, I've needed to look into buying a wireless router for a mission-critical system at work that will need to support quite a few simultaneous connections (potentially a few hundred laptops). One thing I've noticed is that there seems to be a dramatic difference between the max. simultaneous connections different routers can support; see this page for example - anything from 32 to 35,000! Why is there this degree of difference? You'd have thought that if we know how to make routers that can handle thousands of connections, we wouldn't be making stuff that's limited to a pathetic 32 anymore. Is it a firmware thing? A hardware thing? Are low-end manufacturers purposely putting low arbitrary connection limits in so people can be "encouraged" to pay more for high-end routers?

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• MySQL hangs if connection comes from outside the LAN

  - by Subito

  I have a MySQL Server operating just fine if I access him from his local LAN (192.168.100.0/24). If I try to access hin from another LAN (192.168.113.0/24 in this case) it hangs for a really long time before delivering the result. SHOW PROCESSLIST; shows this process in Sleep, State empty. If I strace -p this process I get the following Output (23512 is the PID of the corresponding mysqld process): Process 23512 attached - interrupt to quit restart_syscall(<... resuming interrupted call ...>) = 1 fcntl(10, F_GETFL) = 0x2 (flags O_RDWR) fcntl(10, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(10, {sa_family=AF_INET, sin_port=htons(51696), sin_addr=inet_addr("192.168.113.4")}, [16]) = 33 fcntl(10, F_SETFL, O_RDWR) = 0 rt_sigaction(SIGCHLD, {SIG_DFL, [CHLD], SA_RESTORER|SA_RESTART, 0x7f9ce7ca34f0}, {SIG_DFL, [CHLD], SA_RESTORER|SA_RESTART, 0x7f9ce7ca34f0}, ) = 0 getpeername(33, {sa_family=AF_INET, sin_port=htons(51696), sin_addr=inet_addr("192.168.113.4")}, [16]) = 0 getsockname(33, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("192.168.100.190")}, [16]) = 0 open("/etc/hosts.allow", O_RDONLY) = 64 fstat(64, {st_mode=S_IFREG|0644, st_size=580, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9ce9839000 read(64, "# /etc/hosts.allow: list of host"..., 4096) = 580 read(64, "", 4096) = 0 close(64) = 0 munmap(0x7f9ce9839000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 64 fstat(64, {st_mode=S_IFREG|0644, st_size=880, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9ce9839000 read(64, "# /etc/hosts.deny: list of hosts"..., 4096) = 880 read(64, "", 4096) = 0 close(64) = 0 munmap(0x7f9ce9839000, 4096) = 0 getsockname(33, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("192.168.100.190")}, [16]) = 0 fcntl(33, F_SETFL, O_RDONLY) = 0 fcntl(33, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(33, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 setsockopt(33, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 fcntl(33, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(33, SOL_IP, IP_TOS, [8], 4) = 0 setsockopt(33, SOL_TCP, TCP_NODELAY, [1], 4) = 0 futex(0x7f9cea5c9564, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f9cea5c9560, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0x7f9cea5c6fe0, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1) = 1 ([{fd=10, revents=POLLIN}]) fcntl(10, F_GETFL) = 0x2 (flags O_RDWR) fcntl(10, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(10, {sa_family=AF_INET, sin_port=htons(51697), sin_addr=inet_addr("192.168.113.4")}, [16]) = 31 fcntl(10, F_SETFL, O_RDWR) = 0 rt_sigaction(SIGCHLD, {SIG_DFL, [CHLD], SA_RESTORER|SA_RESTART, 0x7f9ce7ca34f0}, {SIG_DFL, [CHLD], SA_RESTORER|SA_RESTART, 0x7f9ce7ca34f0}, ) = 0 getpeername(31, {sa_family=AF_INET, sin_port=htons(51697), sin_addr=inet_addr("192.168.113.4")}, [16]) = 0 getsockname(31, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("192.168.100.190")}, [16]) = 0 open("/etc/hosts.allow", O_RDONLY) = 33 fstat(33, {st_mode=S_IFREG|0644, st_size=580, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9ce9839000 read(33, "# /etc/hosts.allow: list of host"..., 4096) = 580 read(33, "", 4096) = 0 close(33) = 0 munmap(0x7f9ce9839000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 33 fstat(33, {st_mode=S_IFREG|0644, st_size=880, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9ce9839000 read(33, "# /etc/hosts.deny: list of hosts"..., 4096) = 880 read(33, "", 4096) = 0 close(33) = 0 munmap(0x7f9ce9839000, 4096) = 0 getsockname(31, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("192.168.100.190")}, [16]) = 0 fcntl(31, F_SETFL, O_RDONLY) = 0 fcntl(31, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(31, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 setsockopt(31, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 fcntl(31, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(31, SOL_IP, IP_TOS, [8], 4) = 0 setsockopt(31, SOL_TCP, TCP_NODELAY, [1], 4) = 0 futex(0x7f9cea5c9564, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f9cea5c9560, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0x7f9cea5c6fe0, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1^C <unfinished ...> Process 23512 detached This output repeats itself until the answer gets send. It could take up to 15 Minutes until the request gets served. In the local LAN its a matter of Milliseconds. Why is this and how can I debug this further? [Edit] tcpdump shows a ton of this: 14:49:44.103107 IP cassandra-test.mysql > 192.168.X.6.64626: Flags [S.], seq 1434117703, ack 1793610733, win 14600, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 14:49:44.135187 IP 192.168.X.6.64625 > cassandra-test.mysql: Flags [P.], seq 106:145, ack 182, win 4345, length 39 14:49:44.135293 IP cassandra-test.mysql > 192.168.X.6.64625: Flags [P.], seq 182:293, ack 145, win 115, length 111 14:49:44.167025 IP 192.168.X.6.64624 > cassandra-test.mysql: Flags [.], ack 444, win 4280, length 0 14:49:44.168933 IP 192.168.X.6.64626 > cassandra-test.mysql: Flags [.], ack 1, win 4390, length 0 14:49:44.169088 IP cassandra-test.mysql > 192.168.X.6.64626: Flags [P.], seq 1:89, ack 1, win 115, length 88 14:49:44.169672 IP 192.168.X.6.64625 > cassandra-test.mysql: Flags [P.], seq 145:171, ack 293, win 4317, length 26 14:49:44.169726 IP cassandra-test.mysql > 192.168.X.6.64625: Flags [P.], seq 293:419, ack 171, win 115, length 126 14:49:44.275111 IP 192.168.X.6.64626 > cassandra-test.mysql: Flags [P.], seq 1:74, ack 89, win 4368, length 73 14:49:44.275131 IP cassandra-test.mysql > 192.168.X.6.64626: Flags [.], ack 74, win 115, length 0 14:49:44.275149 IP 192.168.X.6.64625 > cassandra-test.mysql: Flags [P.], seq 171:180, ack 419, win 4286, length 9 14:49:44.275189 IP cassandra-test.mysql > 192.168.X.6.64626: Flags [P.], seq 89:100, ack 74, win 115, length 11 14:49:44.275264 IP 192.168.X.6.64625 > cassandra-test.mysql: Flags [P.], seq 180:185, ack 419, win 4286, length 5 14:49:44.275281 IP cassandra-test.mysql > 192.168.X.6.64625: Flags [.], ack 185, win 115, length 0 14:49:44.275295 IP cassandra-test.mysql > 192.168.X.6.64625: Flags [F.], seq 419, ack 185, win 115, length 0 14:49:44.275650 IP 192.168.X.6.64625 > cassandra-test.mysql: Flags [F.], seq 185, ack 419, win 4286, length 0 14:49:44.275660 IP cassandra-test.mysql > 192.168.X.6.64625: Flags [.], ack 186, win 115, length 0 14:49:44.275910 IP 192.168.X.6.64627 > cassandra-test.mysql: Flags [S], seq 2336421549, win 8192, options [mss 1351,nop,wscale 2,nop,nop,sackOK], length 0 14:49:44.275921 IP cassandra-test.mysql > 192.168.X.6.64627: Flags [S.], seq 3289359778, ack 2336421550, win 14600, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0

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• Having munin server monitoring problem: Graphs not being generated.

  - by geerlingguy

  When I run munin-cron (munin-cron --debug), I get the following error: 2010/05/10 13:39:01 [WARNING] Call to accept timed out. Remaining workers: archstl.org;archstl.archstl.org 2010/05/10 13:39:01 [DEBUG] Active workers: 1/8 These errors simply keep repeating themselves until I quit munin-cron. I've followed the directions for debugging munin on the 'Debugging Munin plugins' wiki page, but I get the following results when going through their directions: After telnetting to localhost 4949, I can see a list of plugins, see a node at archstl.archstl.org, but can't fetch anything. The output is as follows: >fetch cpu . However, on the same machine (which is both the node and the master munin server), I can run munin-run cpu, and it prints the results correctly to the command line, like so: user.value 100829130 nice.value 3479880 system.value 13969362 idle.value 664312639 iowait.value 12180168 irq.value 14242 softirq.value 199526 steal.value 0 Looking at the wiki page mentioned above, it looks like it might be a plugin environment problem, but I can't figure out how to fix/change this... If the plugin does run with munin-run but not through telnet, you probably have a PATH problem. Tip: Set env.PATH for the plugin in the plugin's environment file.

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• Monitoring User Login time

  - by beakersoft

  Hi, i have recently been given the task of trying to work out why the login time (not machine boot time) for some of our users seems slow. The vast majority of clients (95%) are running on XP sp3, Windows 2003 domain controlers. Most users have the same model of machine. I would like to be able to see how long each of the polices are taking to load (if possable split user and computer) and any other info that might help (services starting etc) I changed the userenvdebuglevel reg option to generate the userenv.log file but it did'nt contain very much info Thanks Luke

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• Brand new Seagate HDD has high raw read error rate

  - by kpax

  I've just purchased a brand new Seagate ST31000524AS 1TB HDD. Manufacture date shows as January 2012 (yes that's as new as new can get), so must be one of the new batches from the post-flood Thailand. Anyway, I downloaded a copy of Active Hard Disk Monitor tool to check the S.M.A.R.T. parameters and I find the parameter Raw Read Error Rate is very low. Should I be worried? Will this rectify over time? This hdd is just 7 hours old; what gives? Edit: I meant high raw read error rate - Title updated accordingly

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• Flash stream makes my internet slow and cpu rush

  - by user1225840

  When I try to watch a live Flash stream, my CPU usage goes up to 75% and my Internet speed goes down. If I run a test before the video-stream, my speed is ~40/10Mbps and during the stream it drops to 0.1-0.5Mbps. The stream is laggy and I can only watch one to two seconds at a time, start/stop/start/stop. I have cleared my history, cache, cookies, temp files, and so on. I have searched for malware and took care of that. I have updated my drivers, reinstalled Flash and everything else I can think of, but it remains slow. I had this problem before and it just started working normally from one day to another. Could it be a hardware problem?

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• VMWare Pre-Allocated vs. Growable, which is faster?

  - by tekiegreg

  In an effort to increase speed in my Vmware setup, I was thinking about converting a Windows XP Guest 32 bit I have from growable to pre-allocated, I'm currently running VMWare Workstation 7 with Windows 7 64 bit as the host. Specs: Dual Core CPU, one allocated to guest 4GB of RAM, 2GB to guest HD max capacity is 500GB, 150GB allocated to guest (I have 300GB left and don't mind parting with the space, currently HD is 80GB and converting would obviously add another 70GB of space), HD that guest is running on is separate from Host OS Either that or any other suggestions you have might be appreciated, thanks!

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• How dow I remove 1.000.000 WebsiteCache directories?

  - by harper

  I found that in a WebsiteCache directory more than 1.000.000 subdirectories has been created. I want to remove all these directories. My first approach was to use the command line tool: cd WebsiteCache rmdir /Q /S . This will remove all subdirectories except WebsiteCache itself, since it is the current working directory. I noticed after two hours that the directoriws starting with A-H have been removed. Why does rmdir removes the directories in alphabetical order? It must take additional effort to do this ordered. What is a fast way to deleted such an amount of directories?

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• Jumbo Frames, ISCSI and ESXi

  - by vlannoob

  I have enabled Jumbo Frames (9000) in ESXi for all my vmNICs, vmKernels, vSwitches, iSCSI Bindings etc - basically anywhere in ESXi where it has an MTU settings I have put 9000 in it. The ports on the switches (Dell PowerConnects) are all set for Jumbo Frames. I have a Dell MD3200i with 2 controllers, each with 4 ports for iSCSI. Each of these ports is set to Jumbo Frames (9000) as well. So now the questions: Do I need to log into each Windows Server VM I am running and delve into the NIC properties and manually set it to Jumbo Frames in the NIC properties in the device Manager as well? Whats the best way of testing that Jumbo Frames are indeed working as intended?

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• How to configure an ASUS motherboard.

  - by Absolute0

  I have an ASUS P7P55-M motherboard running with an Intel Core i5-750 processor and 4 GB RAM with 1600 MT/s speed. For some reason the default settings of the motherboard make all the components run at half their optimums. I have switched to the "D.O.C.P." profile and supposedly everything is as it's supposed to be (verified with CPU-Z). There is also an "X.M.P." profile and a manual one. Are either of the DOCP or XMP safe to go with? I wouldn't use the manual mode as I would likely mess something up real bad. XMP seems to be more memory oriented.

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• Reporting memory usage per process/program

  - by Nick Retallack

  How can I get the current memory usage (preferably in bytes so they can be added up accurately) for all running processes individually? Can I roll up the summaries for child processes into the process that spawned them? (e.g all apache threads together). Sometimes, my server runs out of memory and becomes unresponsive. I want to discover what is using up all the memory. Unfortunately, it's likely to not be a single process. Some programs spawn hundreds of processes, each using very little memory, but it adds up. On a side note, is it normal for apache to spawn 200+ processes?

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• iptables, blocking large numbers of IP Addresses

  - by Twirrim

  I'm looking to block IP addresses in a relatively automated fashion if they look to be 'screen scraping' content from websites that we host. In the past this was achieved by some ingenious perl scripts and OpenBSD's pf. pf is great in that you can provide it nice tables of IP addresses and it will efficiently handle blocking based on them. However for various reasons (before my time) they made the decision to switch to CentOS. iptables doesn't natively provide the ability to block large numbers of addresses (I'm told it wasn't unusual to be blocking 5000+), and I'm a bit cautious over adding that many rules into an iptable. ipt_recent would be awesome for doing this, plus it provides a lot of flexibility for just severely slowing down access, but there is a bug in the CentOS kernel that is stopping me from using it (reported, but awaiting fix). Using ipset would entail compiling a more up-to-date version of iptables than comes with CentOS which whilst I'm perfectly capable of doing it, I'd rather not do from a patching, security and consistency perspective. Other than those two it looks like nfblock is a reasonable alternative. Is anyone aware of other ways of achieving this? Are my concerns about several thousand IP addresses in iptables as individual rules unfounded?

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• Ultra-lightweight web browser?

  - by zildjohn01

  Are there any good super-lightweight graphical web browsers out there? I'd like to be able to browse the web on an old PC, but the mainstream crop of browsers is just too heavy, and I don't want to resort to something like Lynx. There must be something decent out there that'll fit in 16 or 32MB of RAM comfortably. 100% standards compliance isn't necessary, but I'd like something that supports the most widely used parts of CSS and JavaScript. The goal is to get 98% of sites usable in a nice, graphical format.

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• Soundtest works, but no other sounds and windows starts very slowly

  - by Kristian Kari

  So suddenly all sounds on my computer stopped working expect the sound test works, but when I go to control panel and audio it says there's no audio device. And audio players and audio on website doesn't work either. and Also windows starts very slowly. I'm not sure if this helps but I'll tell what happened before this. I downloaded this program from a little shady website, I hesitated and for a good reason I guess cos the moment I finished downloading it, my antivir detected it as unwanted program and put it on quarantine. I thought everything was fine, but had some problems with program (won't go to details about it cos it's not really related to audio) so rebooted the computer and I was suprised that windows started really really slowly. It took like 5 mins to load the desktop such. After that I noticed the sounds were missing, I immediately deleted the program since I thought it was causing the problem. But it didn't change much. I tried to find the solution with no success and now I'm just scanning again my computer. I'd be thankful if anyone would be able to help me. I might have left a thing or ten things out, so feel free to ask. oh and I'm using windows xp

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• What are possible causes of keyboard lag on my desktop machine?

  - by Jer

  I am running Windows 7 and began experiencing keyboard lag in most applications, and it seems to be getting worse. Certain websites are the worst - on some, I can type a sentence, take my hands off the keyboard, and watch the characters continue to appear on the screen for several seconds. Others are not as bad, but still noticeable and annoying. I just started noticing it in non-browser applications (e.g. Outlook) as well. I've disabled all extensions in Firefox, rebooted my machine, and that did nothing. There is nothing using much memory or cpu cycles, even when the lag is occurring. This is a machine at work with very strict controls over what can be installed, so the chances of any kind of malware are very slim. I don't believe anything as been installed since before the problem started. What could be causing this, and/or what can I do to debug?

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• windows 2000 freezing during large disk write

  - by robert

  We have a windows 2000 sp4 server which freezes up for about 1 minutes while its web-app does a ~500mb write operation. I can see the webapp start to do I/O activity (through process explorer) then the RDP session becomes unresponsive, you can click on windows and buttons but nothing happens. When the disk write finally finishes the session 'catches up' on all the mouse clicks you did during the freeze in a mad flurry of window activity and the server returns to normal. During the freeze the web-app stops as well. The same behaviour happens on the console of the server. (so I know its not a network thing) Nothing appears in the Event logs. Its like nothing happened. I have upgraded all the HP hardware drivers to the latest proliant support pack. And also run a HP hardware diagnostics which found nothing wrong. What would cause a disk write to lock the rest of the OS?

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• What's throttling the database?

  - by Troels Arvin

  Hardware: Intel x86_64 with 192GB of RAM. OS: CentOS 5.4 x86_64. DBMS: DB2 v. 9.7.1 64 bit. During certain special workloads (e.g. parallel REORGs/RUNSTATs), I've seen the server transporting 450MB/s with 25000IO/s (yes, there is probably some storage system caching happening here) while all CPU cores were happily working in an even mix of usermode/wait. And disk benchmark tools can also bring some very satisfying bandwith and IO/s numbers to the table. On the other hand, we also have another scenario: A single rather complex query with at least one large table scan. db2's "list applications" reports that the query is Executing (not locked). IO: At most 10MB/s, 500 IO/s; CPU: two cores in 99.9% wait state, all other cores 100% idle. The tables which the query reads from have been altered to have LOCKSIZE=TABLE, so I would think that lock list work is zero. What's going on in such a situation? What tools/snapshots/... can I use to gain better insight in such a case?

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• Firefox/Flash memory monsters

  - by ULTRA_POROV

  1.5 gb. have 10 open flash sites (small sites). The sites are 2 - 4mb great :D :D :D congrats mozilla/adobe!

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• Microsoft Mouse and Keyboard Center - Slow response for App-specific shortcuts

  - by Darrel Hoffman

  So a few months ago, I bought a new MS mouse, and was surprised that they'd discontinued Intellipoint in favor of this Microsoft Mouse and Keyboard Center. It seems to have the same functionality underneath all the bloat, but there's a very serious drawback - when I set up application-specific functions for the extra buttons on the mouse, they work, but sometimes with a very long delay, like up to a minute or more. For example, I often set up the left side button as an "Undo" in various programs for convenience. But sometimes, when I try to use that Undo button, nothing happens, so I'm forced to use the standard Ctrl-Z or whatever. But then, a minute or so later, it suddenly remembers that I hit that button a while back, and calls the Undo unexpectedly on something entirely different. It's infuriating. No modern computer function should be this slow. It's not the software or the computer itself, because doing an Undo via Ctrl-Z or the menu still works instantly. It's very definitely a side-effect of delayed response to the mouse button. Usually after it delays the first time, it'll work quickly after that, but if you haven't used a given shortcut in several minutes, it "forgets" again and you get another inexplicably long delay. Intellipoint never had this problem, but it's not supported any more, and not compatible with the newer mice. Has anyone else noticed slow-downs with MS M&K C and app-specific shortcuts? Any ideas how to get around this? I use these shortcuts extensively in my workflow and it's just entirely unacceptable to have such a long delay in what should be a pretty basic feature.

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• When using RAID10 + BBWC why is it better to separate PostgreSQL data files from OS and transaction logs than to keep them all on the same array?

  - by Vlad

  I've seen the advice everywhere (including here and here): keep your OS partition, DB data files and DB transaction logs on separate discs/arrays. The general recommendation is to use RAID1 for OS, RAID10 for data (or RAID5 if load is very read-biased) and RAID1 for transaction logs. However, considering that you will need at least 6 or 8 drives to build this setup, wouldn't a RAID10 over 6-8 drives with BBWC perform better? What if the drives are SSDs? I'm talking here about internal server drives, not SAN.

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• High disk I/O activity in CentOS server

  - by triiim

  I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this is what I see on the bottom (the server has been restarted thats why the values are so low): *** system and process activity since boot *** PID RDDSK WRDSK WCANCL DSK CMD 1/18 2176 1.7G 7.3G 854.4M 39 mysqld 671 1248K 3.0G 0K 13 flush-8:0 566 0K 1.1G 0K 5 jbd2/sda2-8 2401 124.2M 529.1M 22408K 3 crond 2032 2.2G 502.0M 0K 12 nginx 2360 425.8M 115.3M 4188K 2 httpd flush-8:0 and jbd2/sda2-8 are the processes I see with iotop using 99% on the IO column, and they are the processes that write the most on the hdd (after mysql). From what I saw in google this could be caused by some ext4 related bug, the current kernel is: Linux srvr.com 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux I asked the hosting support to update the kernel and they tried but they now say that the server wont boot with the new installed kernel and they had to go back to the previous, they are not helping very much. Does someone has any idea how could I solve the high disk usage caused by flush-8:0 and jbd2/sda2-8 processes?

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• SQL Server Full Text Search resource consumption

  - by Sam Saffron

  When SQL Server builds a fulltext index computer resources are consumed (IO/Memory/CPU) Similarly when you perform full text searches, resources are consumed. How can I get a gauge over a 24 hour period of the exact amount of CPU and IO(reads/writes) that fulltext is responsible for, in relation to global SQL Server resource usage. Are there any perfmon counters, DMVs or profiler traces I can use to help answer this question?

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