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OSX

OS X Odyssey 328 - OS 10.2.6 Memory Leak (Or Whatever) Bites

Wednesday, May 21, 2003

By Applelinks Contributing Editor Charles W. Moore

Yr hmbl srvt is not a happy camper this morning. As I reported in Odyssey 327 yesterday, I upgraded OS X on my Pismo to version 10.2.6 on the weekend.

I had been reasonably happy with OS 10.2.4 on this machine, and it was the version that finally pushed me over the threshold to adopting OS X as my main production OS, after a year and a half of experimentation and abortive forays. In short, 10.2.4 was stable, and the maddening phenomenon of the machine gradually slowing down to a crawl after two or three days of uptime that had plagued me in earlier builds of OS X seemed to have finally been licked. I had been able to go for 10 days or more without a restart with no substantial deterioration in perfoirmance.

But the slowdown is baaaaaaaaaaaaaaaak! Worse than ever in 10.2.6.

I've been running 10.2.6 since Sunday. Upon a fresh reboot, all is well, for a few hours. However, as I noted yesterday, I had an odd problem with the Finder quitting that was only rectified by a reboot Monday evening. Yesterday, things went reasonably smoothly, but I had the impression that performance was dragging by the end of the day.

This morning when I woke the Pismo up from its night's rest, things had slowed to a crawl. Just ejecting a floppy disk incited a 15 second wait for the spinning beachball of death to do its thing. The hard drive was chattering like a crazed chipmunk as the system accessed the disk gasping for more memory.

A check with Memory Usage Getter indicated that the RAM was maxed out, with 631 MB of 640 MB "unavailable."

This was with fewer than my usual compliment of applications running. I even had not started up Mozilla Firebird since my last reboot in speculation that it might be causing the memory problems. It wasn't the culprit. Safari was using the most memory (66 MB), even though I had done very little surfing in the past 24 hours.

Quitting Safari and running Cocktail 2.1.1 to dump the caches and logs quieted the hard drive thrashing down somewhat. I now have about 65 MB of free RAM showing. Incidentally, Get Info tells me that there is 1.11 GB free space on my OS X partition, so it's not VM running out of space there. OS 10.2.4 seemed to run happily with 600 MB or less free on the partition.

A thread over on MacFixIt reveals that this issue is not unique to my machine.
http://www.macfixit.com/

As one poster there noted:

"Something has definitely changed, and it is very annoying. After about a half day of usage, everything seems to slow down and I get lots of 2-5 second pauses (similar in feel to the audio pause on laptops, but it happens ever ten seconds rather than every 30). I am having to reboot at least once a day to clear up my RAM."

If this was a hassle with a new version of OS 9, I would simply downgrade to the previous version, which I did, for instance, when OS 9.0.4 proved unacceptably unstable on my former WallStreet PowerBook (9.0.4 ran great on my Cube). I just went through the System folder, threw everything identified as 9.0.4 into the Trash, flushed, ran the OS 9.0 installer, and stability was restored. I eventually upgraded that installation to OS 9.1 and ran on it for nearly a year before doing a clean reinstall. Those were the days!.

Anyway, downgrading to OS 10.2.4 from 10.2.6 would be a much more formidable proposition, and one that I simply don't have time to mess around with right now. Perhaps Cocktail will keep me going until 10.2.7 or Panther arrives. Or I might just go back to OS 9 for a while for production work. Sigh. It should be better than this, 2 1/2 into OS X's public release.

***
For What It's Worth Dept.
Re : National Post Not Loading Properly Under iCab 2.9.1

***

For What It's Worth Dept.

From Dan Johnson

Good Morning Charles,

I have read with interest the comments both in AppleLinks and elsewhere about the speed difference's in OS 9.2 vs. OS X 10.2.whatever.

I have a Pismo PB 400 with 768 MB RAM and a 6GB drive, so when I upgraded to OS X I did not install OS 9, I wanted to save the hard drive space. I just inherited my daughters old iMac Grape 333 160mg ram and 6 GB drive running 9.2.2. Both are now hooked side by side to our cable modem.

I can say without any smirking that 9.2 is not faster than OS X......no it's not faster it's lightspeeds faster ! GADS ! The difference is so striking with the somewhat slower machine beating the somewhat faster machine hands down. I was going to upgrade this machine to OS X, but I won't be doing that anymore. I will only upgrade it kicking and screaming and everything OS 9 we use will have to have stopped working completely.

Now don't get me wrong I like OS X, I think it's easier to use and configure, no control panels, no extensions (I think) and it sure does look better than OS 9. But they (Apple) better make Panther much much much faster or forget about getting any of my money. 

Just my 2 cents worth (not sure what that would be in Canadian cents).

Dan

___

Hi Dan;

Yes, I've been dual-booting back and forth between OS 9 and OS X on the same machines for more than a year and a half, and going back to 9 after several days in X is like kicking in the Warp drive. Zowie! If nothing else, OS X has profoundly made me appreciate how fast OS 9 is.

Unfortunately, the trend line seems to be deteriorating, with the latest versions of Jaguar even more sluggish doing evveryday stuff than 10,1 or the early builds of 10.2 were. And now there's this apparent *bad* memory leak problem (see rant above) with 10.2.6. Arrrrrgh! I may go back to OS 9.1 for production work yet!

Charles

***

Re : National Post Not Loading Properly Under iCab 2.9.1

From Tony Wight

Hello,

I'm using the current beta, b154, of iCab 2.9.5 under Mac OS 9.2.2. I'm
not having any obvious problem with loading
<http://www.nationalpost.com/home/index.html>.

It does draw a bit funny still as we await the fuller CSS support due in iCab 3.0 but all the text seems to be there.

Looking at the source, it seems to be doing browser sniffing, so you might want to adjust your iCab identities for this site, via the Filter Manager.

I use JavaScript Identity/Setting set to "Microsoft Internet Explorer 6.0" and Network Identity/Proxies set the Browser Identity to "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)". This combination was recommended for general use by Thomas Much, one of the iCab developers, on the iCab list serve a couple of months ago.

best wishes,
Tony.

P.S. You might want trying enabling Prefetch, off the File menu, for the National Post to speed up loading pages there after the first page. Also if you disable javascript for the ads, such as
<http://ad.ca.doubleclick.net/>, it should load a tad faster.

___

Hi Tony;

iCab 2.91 loads all the text on the NP homepage too -- it just ends up a couple of scroll screens down the page from the header information. The problem, as you note, is incomplete CSS implementation.

My copy of iCab is set to Mozilla 4.5 compatible....

I like iCab, and it is my browser of choice for a lot of workaday stuff I do on the Web. However, it is now significantly slower than the Safari/Camino/Firebird speedsters, and I'm addicted to tabbed browsing for general surfing.

Charles

***

The OS X Odyssey archives may be accessed here:
http://www.applelinks.com/news/odyssey/

***

***
Charles W. Moore

Note: Letters to Moore's Mailbag may or may not be published at the editor's discretion. Correspondents' email addresses will NOT be published unless the correspondent specifically requests publication. Letters may be edited for length and/or context.

Opinions expressed in postings to Moore's MailBag are those of the respective correspondents and not necessarily shared or endorsed by the Editor and/or Applelinks management.

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CM


Charles W. Moore

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