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Re: Help, PHP/Mysql connections are so slow.
by Jun Salen 10 Jun '08

10 Jun '08

>>I've got a new Centos 5.1 x86-64 server that uses PHP to >>communicate with MySQL5. On this server, PHP/Mysql connections are dead >>slow and unresponsive. It takes sometimes up to a minute to list tables >>in phpmyadmin for example. My suggestion is just for the test and see if it will improve, try to update from RPMForge both your apache, php and mysql one at a time then test. I believe Dag's repo has more recent version. Thanks, junji aisalen.wordpress.com Linux Registered User #253162 CentOS User Send instant messages to your online friends http://uk.messenger.yahoo.com

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Help, PHP/Mysql connections are so slow.
by Pro Green European 09 Jun '08

09 Jun '08

Hi. I've got a new Centos 5.1 x86-64 server that uses PHP to communicate with MySQL5. On this server, PHP/Mysql connections are dead slow and unresponsive. It takes sometimes up to a minute to list tables in phpmyadmin for example. I've verified on the server that the issue has to be PHP/Mysql related. If I use a CGI based Mysql admin tool, communication is fast and there are no delays. The server is Xeon based and has 4GB of RAM. SElinux is enabled, and ModSecurity for Apache too. Disabling these two does not help. SElinux allows Apache to network connect. Some php.ini settings: =============================== safe_mode = On max_execution_time = 60 max_input_time = 60 memory_limit = 128M open_basedir is active, and there are no conflicts. disable_functions also contain several functions in order to secure server. allow_fopen_url is disabled =============================== Could there be a bug somewhere that is causing this slowness for PHP/Mysql connections. Feedback and tips for solving this problem will be greatly appreciated :) Regards, /PGE (aka mysteron) --- Link to forum post: http://www.centos.org/modules/newbb/viewtopic.php?topic_id=14575&start=… --- Answer I've recieved and answered: Q: Sounds like the server is trying to do a reverse DNS lookup and timing out after a minute plus. Is DNS set up on the server correctly? A: Yes, DNS is working correctly. I tried with the IP address of the database server instead of its DNS name, but there is no difference, PHP/Mysql connections are still dead slow. ---

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Olivier Castien/Roncq/Infofrance/FRA/TZG est absent.
by Olivier_Castien＠zieglergroup.com 09 Jun '08

09 Jun '08

Je serai absent(e) à partir du 06/06/2008 de retour le 30/06/2008. Je répondrai à votre message dès mon retour. En cas d'urgence, vous pouvez contacter l'équipe technique d'infofrance.

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Software raid tutorial and hardware raid questions.
by drew einhorn 09 Jun '08

09 Jun '08

I remember seeing one with an example migrating from an old fashioned filesystem on a partition to a new filesystem on a mirrored lvm logical volume but one only one side of the mirror is set up at this time. First I need to copy stuff from what will become the second side of the mirror to filesystem on the first side or the mirror Then I will be ready to follow the rest of the tutorial and build and attach the second side of the mirror. Wish I could remember where I saw that tutorial. Want to embellish the example and stripe each side of the mirror. Understanding a mirrored pair of stripes, seems easier than understanding a striped pair of mirrors. But this seems like a place where counterintuitive results are not a big surprise. I can do mirroring and striping in lvm, mdadm, or a hardware raid controller. There are lots of configurations to ponder. What about recovery after a hardware raid controller? What are the chances of being able to replace the controller and start up successfully from drives? I know that assuming the failed controller did write bad stuff to the drives while it was crashing and burning. I would not be surprised if the controller firmware revisions had to match. I would be surprised but not astonished if the board hardware revision level had to match, too. I hope we are past those days. Anybody know about the LSI Logic MegaRAID 8480 Storage controller in particular. -- Drew Einhorn -- Drew Einhorn

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Re: RE-export nfs mounted share
by whoami i 09 Jun '08

09 Jun '08

Hi Barry, First of all thanx for your reply but i already used the options crossmnt,fsid=0 in my exports file still i am not able to re-export it. Regards lingu On Fri, May 30, 2008 at 5:30 PM, <centos-request(a)centos.org> wrote: > Send CentOS mailing list submissions to > centos(a)centos.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.centos.org/mailman/listinfo/centos > or, via email, send a message with subject or body 'help' to > centos-request(a)centos.org > > You can reach the person managing the list at > centos-owner(a)centos.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CentOS digest..." > > > Today's Topics: > > 1. CentOS-announce Digest, Vol 39, Issue 13 > (centos-announce-request(a)centos.org) > 2. Re: Low-memory Centos5? (Anne Wilson) > 3. Re: Low-memory Centos5? (Wojtek Pilorz) > 4. Re: Low-memory Centos5? (Max Hetrick) > 5. RE-export nfs mounted share (whoami i) > 6. Re: Low-memory Centos5? (Anne Wilson) > 7. Re: Low-memory Centos5? (Robert Moskowitz) > 8. RE: PPPoE client help (John) > 9. Re: kernel-2.6.18-53.1.21.el5 centosplus? (Johnny Hughes) > 10. Re: Low-memory Centos5? (Ned Slider) > 11. Re: 40 second delay on automounts with 2.6.18-53.1.21.el5 > kernel (Johnny Hughes) > 12. Config for NFSv4 an Kerberos on CentOS 5.1 (Sebastian Marten) > 13. Re: Low-memory Centos5? (Wojtek Pilorz) > 14. openafs kernel module (Markus Hetzenecker) > 15. RE: Low-memory Centos5? (Sorin@Gmail) > 16. Re: openafs kernel module (Johnny Hughes) > 17. Re: Config for NFSv4 an Kerberos on CentOS 5.1 (Barry Brimer) > 18. Re: RE-export nfs mounted share (Barry Brimer) > 19. Re: Low-memory Centos5? (Bob Taylor) > 20. servercd i386 5.1 (Jerry Geis) > 21. Re: CentOS 5.2 ? (Johnny Hughes) > 22. RE: CentOS 5.2 ? (Ross S. W. Walker) > 23. Re: servercd i386 5.1 (Ned Slider) > 24. centos on ebox (Jerry Geis) > 25. Re: CentOS 5.2 ? (Ned Slider) > 26. Re: centos on ebox (Ralph Angenendt) > 27. nfsnobody 65534 vs 4294967294 (David Halik) > 28. Re: centos on ebox (Jerry Geis) > 29. Re: centos on ebox (Tru Huynh) > 30. Re: centos on ebox (Jerry Geis) > 31. Re: Re: centos on ebox (Tru Huynh) > 32. Re: Re: centos on ebox (Johnny Hughes) > 33. Re: FireFox (Scott Silva) > 34. Re: Low-memory Centos5? (MHR) > 35. Re: centos on ebox (Jerry Geis) > 36. Re: Re: centos on ebox (Johnny Hughes) > 37. Setting up a chroot (MHR) > 38. Frequent Gnome Terminal crashes in CentOS 5.1 (Alfred von Campe) > 39. Re: centos on ebox (Jerry Geis) > 40. Re: Frequent Gnome Terminal crashes in CentOS 5.1 > (Gregg McClintic) > 41. Re: Re: centos on ebox (Johnny Hughes) > 42. Re: Frequent Gnome Terminal crashes in CentOS 5.1 (Johnny Hughes) > 43. Re: centos on ebox (Jerry Geis) > 44. Re: Setting up a chroot (Johnny Hughes) > 45. RE: /etc/sysctl.conf edit not permanent (Joseph L. Casale) > 46. Re: 40 second delay on automounts with 2.6.18-53.1.21.el5 > kernel (Joe Pruett) > 47. Re: centos on ebox (Jerry Geis) > 48. Re: Frequent Gnome Terminal crashes in CentOS 5.1 > (Alfred von Campe) > 49. Re: centos on ebox (Scott Silva) > 50. Re: 40 second delay on automounts with 2.6.18-53.1.21.el5 > kernel (Ned Slider) > 51. Re: 40 second delay on automounts with 2.6.18-53.1.21.el5 > kernel (Scott Silva) > 52. Re: Re: 40 second delay on automounts with 2.6.18-53.1.21.el5 > kernel (Johnny Hughes) > 53. Re: Frequent Gnome Terminal crashes in CentOS 5.1 (MHR) > 54. Re: FireFox (William L. Maltby) > 55. Re: Centosplus vmware kernels....??? (Tom Bishop) > 56. Negative Values in delay pools (Sergio Belkin) > 57. Re: Frequent Gnome Terminal crashes in CentOS 5.1 > (Filipe Brandenburger) > 58. Re: Frequent Gnome Terminal crashes in CentOS 5.1 > (Filipe Brandenburger) > 59. Re: GFS (Jay Leafey) > 60. Re: Learning some sad things about the state of IPv6 > (Christopher Chan) > 61. Re: Learning some sad things about the state of IPv6 > (Matt Shields) > 62. Re: Learning some sad things about the state of IPv6 (Rob Townley) > 63. Re: Learning some sad things about the state of IPv6 > (Christopher Chan) > 64. Re: FireFox (Robert Spangler) > 65. Re: Config for NFSv4 an Kerberos on CentOS 5.1 (Sebastian Marten) > 66. offline file shares (gopinath) > 67. Re: offline file shares (John R Pierce) > 68. Re: offline file shares (Christopher Chan) > 69. Re: offline file shares (Fabian Arrotin - oxygen) > 70. Re: Centosplus vmware kernels....??? (Tru Huynh) > 71. Re: offline file shares (gopinath) > 72. Hasp Driver required (Balaji) > 73. Re: Hasp Driver required (Anne Wilson) > 74. Re: GFS (Karanbir Singh) > 75. Re: Learning some sad things about the state of IPv6 > (Karanbir Singh) > 76. Re: Frequent Gnome Terminal crashes in CentOS 5.1 > (Alfred von Campe) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 29 May 2008 12:00:14 +0000 (UTC) > From: centos-announce-request(a)centos.org > Subject: [CentOS] CentOS-announce Digest, Vol 39, Issue 13 > To: centos-announce(a)centos.org > Message-ID: <20080529120014.8BC3EF3C973(a)mail.centos.org> > Content-Type: text/plain; charset="us-ascii" > > Send CentOS-announce mailing list submissions to > centos-announce(a)centos.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.centos.org/mailman/listinfo/centos-announce > or, via email, send a message with subject or body 'help' to > centos-announce-request(a)centos.org > > You can reach the person managing the list at > centos-announce-owner(a)centos.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CentOS-announce digest..." > > > Today's Topics: > > 1. CESA-2008:0288 Critical CentOS 3 i386 samba - security update > (Tru Huynh) > 2. CESA-2008:0288 Critical CentOS 3 x86_64 samba - security > update (Tru Huynh) > 3. CESA-2008:0288-01: Critical CentOS 2 i386 samba security > update (John Newbigin) > 4. CESA-2008:0506-05: Low CentOS 2 i386 tzdata enhancement > update (John Newbigin) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 28 May 2008 22:10:34 +0200 > From: Tru Huynh <tru(a)centos.org> > Subject: [CentOS-announce] CESA-2008:0288 Critical CentOS 3 i386 samba > - security update > To: centos-announce(a)centos.org > Message-ID: <20080528201034.GA10630(a)sillage.bis.pasteur.fr> > Content-Type: text/plain; charset="us-ascii" > > CentOS Errata and Security Advisory CESA-2008:0288 > > samba security update for CentOS 3 i386: > https://rhn.redhat.com/errata/RHSA-2008-0288.html > > The following updated file has been uploaded and is currently syncing to > the mirrors: > > i386: > updates/i386/RPMS/samba-3.0.9-1.3E.15.i386.rpm > updates/i386/RPMS/samba-client-3.0.9-1.3E.15.i386.rpm > updates/i386/RPMS/samba-common-3.0.9-1.3E.15.i386.rpm > updates/i386/RPMS/samba-swat-3.0.9-1.3E.15.i386.rpm > > source: > updates/SRPMS/samba-3.0.9-1.3E.15.src.rpm > > You may update your CentOS-3 i386 installations by running the command: > > yum update samba\* > > Tru > -- > Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) > http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B >

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Compact Flash..
by Ryan Nichols 09 Jun '08

09 Jun '08

Ok.. Im curious.. Can I install CentOS on a compact flash card, then have the MySQL on another drive? to have the compact flash like read only for the OS to boot from, then do the swap, mysql,etc from the other drive? How hard would this be to do? Thanks, Ryan Nichols

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Re: [CentOS] sendmail not sending after reboot UPDATE
by Ray Leventhal 09 Jun '08

09 Jun '08

<snip> > > where does the server point to for its dns? if it's (supposed to be) > running a nameserver (e.g., you're pointing to 127.0.0.1) but the dns > server isn't running you'll get a timeout. if you have a second > nameserver configured in /etc/resolv.conf you'll likely ultimately > get a response, but only after you time out on the first. > > by the way, you may want to look at the server's "client" sendmail > queue ("mailq -Ac"). the remote clients dump to the regular queue > (/var/spool/mqueue), but localhost mail goes into the clientmqueue > (/var/spool/clientmqueue). if mail is hanging there it might give > hints that are easier to debug than are remote connections. [you may > also want to try originating mail from localhost and see what > happens.] > > > > - Rick > > The server points to another server on the network for dns, which is running and accepting queries on 53, as expected. resolv.conf points to the correct nameserver IP. I'll check the client queue..hadn't thought of that. Thanks, -Ray

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Re: [CentOS] sendmail not sending after reboot UPDATE
by Ray Leventhal 09 Jun '08

09 Jun '08

lists-centos wrote: > are you configured for spamassassin or clamav as milters on the > server (in the sendmail.cf) and either/both of these didn't start up > on the reboot? sendmail will still accept mail with sa/clamav not > running, but it takes a bit longer. > there's also the possibility of an inverse-map lookup on the > ipnumbers of the inbound client machines. if the server is trying to > do the lookups but is having trouble reaching the appropriate > in-addr.arpa server you'll get long hangs. > > - Rick > Hi Rick, no milters are configured...this is a really small intranet with absolutely no connectivity to the outside world. I'm baffled. Regarding your mention of a dns issue...it may be, but i'm still baffled as this was all working before the weekend. I rebooted the box on Sunday and am in this <pun intended> bind today :) Thanks for your input...much appreciated. -R

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new install of 5.1 with KVM-over-IP - can't install with GUI - need assistance
by Alon 09 Jun '08

09 Jun '08

Hi All, I have several dozens of CentOS and WhiteBox servers. Most of them are CentOS 4.6. Our installation service is done in the datacenter where the servers are located. When we install a fresh clean install, we use the GUI menus, while using the KVMoverIP. That was working great with CentOS 4.x In CentOS 5.x, the installation process 'annonces" that "Hey,. I know you are using a KVM and don't have a monitor attached" (who cares??). But, "since you are using a KVM and no monitor is attached,. you CANNOT use the GUI installation". Why??? 4.x didn't care for this. Why make my life difficult? I have to 'cheat' by calling the datacenter to plug a monitor for the first minute of the install and then plug back the KVM cable. Isn't this stupid? of course it is! I am looking for a solution such as a parameter that I can pass to the boot sequence (vga=nommconf or something like that) so that it won't do the probing for the VGA and just let me go about my business. Mind you that this is a problem both with DELL PowerEdge 1950iii with DRAC5 remote consule as well as with just plain PCs that use ATEN KVM 9116. Once the probe understand that we don't use a monitor it prompts the 'can't use the GUI'. Any pointers about this? Thanks, -Sup.

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RE: [CentOS] Copying files from specific date.
by Rajeev R. Veedu 09 Jun '08

09 Jun '08

-----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Steve Huff Sent: Monday, June 09, 2008 7:34 PM To: centos(a)centos.org Subject: Re: [CentOS] Copying files from specific date. On Jun 9, 2008, at 11:16 AM, Rajeev R. Veedu wrote: > Does anyone aware of any utility to copy files which are created > or modify form a specific date ?. > >>to copy all files in /dir1 modified within the last 5 days to /dir2: >>$ find /dir1 -mtime -5 | xargs -I {} cp {} /dir2 >>if the filenames have whitespace in them, you can use this trick: >>$ find /dir1 -mtime -5 -print0 | xargs -0 -I {} cp {} /dir2 >>for more details on selecting by time: >>$ man find >>pay particular attention to the options -atime, -amin, -ctime, -cmin, >>-mtime, -mmin, and -daystart. >>-steve -- Actually I need to copy this on to another server with same folder structure. I think I need to explain bit of history. I had a server crash last week, and we have restored the files from the tape. However during this period of making the server up, the users having adding or changed files from our backup Server (Samba server which rsync to production server every night.) now I need to copy the files which user added/ modify last 7 days. Ideally if I can get this option in rsync it would be better. Otherwise I need to have a method so that all changed files to go on the relevant folder on the production server. I cannot take the full files in the backup files since they are historical backup and there are some unwanted files. Can I use scp instead of cp in your statement?. But how does it take the same directory name as the original location? Eg:from ServerA/FLDR2/FLDR3/Filename should go to ServerB/FLDR2/FLDR3/FILENAME Only change is the server name all other values will remain same. Any help would be really appreciated. Thanks Rajeev

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