| Evolution | davidfetter: 2 questions. since rhel5/centos5 ships with postgresql, and is still beta, why do I care? well, really.. just that one question... jsoftw: really it depends more on the disk controller (drivers) than most other things. what controller are you using out of curiosity? |
| jsoftw | Evolution: I forget the model. Its a 4 disk SCSI raid, 256mb, raid 1+5 it is very very fast when you just copy one file |
| Evolution | why 1+5? |
| jsoftw | but like on any other machine running linux ( that I have been in ) it starts getting very slow when more than one disk thing is going on at one time ) redundancy and larger capacity |
| Evolution | jsoftw: 1+0 would give you that. and be faster. 1+5 seems to have the belt and a set of parity suspenders. :-P I used to have some I/O issues also, then I learned about ext3 stride, and fixed my filesystem, enabled dir_index, and changed my elevator system flies now after that. some minor tuning was also required in /etc/sysctl.conf, but those were application specific |
| jsoftw | Yeah. The disks can write at around 50 - 60 mb per second continuous Its not slow in that department What is slow is something to dow ith the filesystem So yep, Gotta sort that out. |
| Evolution | yeah. it's when you do reads while writing that it bogs down. that's where data=writeback and a different elevator option can help (on ext3) |
| jsoftw | I might try that. |
| davidfetter | Evolution, sorry. on phone w/friend who's about to go into surgery |
| jsoftw | Evolution: seems to be less reliable in the event of a crash though |
| Evolution | a little, but that's why ext3 is a little slower there than other filesystems. writeback makes it behave like xfs. |
| jsoftw | Is there a way to disable atime ( like mounting with noatime flag ) on an already mounted filesystem? |
| Evolution | read up on the bind option in mount's manpage. (yes, there is a way) |
| davidfetter | Evolution, anyhow, i'm looking at pg 8.2, which i need for a client so i figured i'd start with the PGDG SRPMs Evolution, any ideas about why it's complaining about this thread safety business? |
| Evolution | davidfetter: have you looked in config.log like it says? personally right now I could care less about non-centos apps on the beta. I'd rather get centos5 stable and released. |
| davidfetter | yep. should i paste it somewhere? i can't make heads or tails of it hrm. sorry to trouble you, then. anybody else? |
| Edgan | Evolution: any way to view the stride of a filesystem? |
| seekwill | If I have 2GB of RAM, is there any reason to use the 64bit version? |
| Edgan | seekwill: more registers |