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тАО11-04-2004 07:07 PM
тАО11-04-2004 07:07 PM
Non-paged dynamic memory
58 stations consume 2.5 MB np dyn mem. 2 consume 6.5 MB. This while using the same programs.
I checked with sda show pool/sum.
I found following big differences.
1) ORB normally takes 25 K but takes about 1 MB on the 2 stations
2) UCB normally takes 85 K but takes almost 2 MB on the 2 stations
3) MISC normally takes 100 K but takes 1.5 MB on the 2 stations
What does it all means and how can I find the process causing it ?
A virtual Duvel for he who solves it.
Wim
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тАО11-04-2004 07:43 PM
тАО11-04-2004 07:43 PM
Re: Non-paged dynamic memory
I found that BYTLM had been eaten too for certain processes. Then I found that 85% of available channels of that process were taken. Network problems caused the application to re-connect but without releasing the network devices.
Wim
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тАО11-04-2004 07:47 PM
тАО11-04-2004 07:47 PM
Re: Non-paged dynamic memory
let's start looking at the UCBs (these should be Unit Control Blocks for devices).
SDA> SHOW POOL/HEAD/TYPE=UCB
type return until the list ends. It should tell you the UCB packet count and the bytes used for all those UCBs.
Then look at some of the UCB addresses found with SDA> SHOW DEV/ADDR=
Which kind of devices are these ?
Then do the same with /TYPE=ORB. ORBs are Object's Rights Blocks. What's the no. of packets ? You can format some of the ORBs with
SDA> READ SYSDEF
SDA> FORMAT
The associated device name is pointed to by
ORB$L_NAME_POINTER, so after you formatted an ORB, try:
SDA> EXAM @(.+orb$l_name_pointer);8
If the count of UCBs, ORBs and MISCs is about the same, you'll known that these packets somehow all are related to each other.
Volker.
PS: My guess would be: something from TCPIP, but you'll find out soon...
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тАО11-04-2004 08:05 PM
тАО11-04-2004 08:05 PM
Re: Non-paged dynamic memory
Show dev net/fu shows a lot of devices allocated by a few processes. But in TCPIP there is no device and in decnet no connection. What could be the problem ?
The application people don't know why.
Wim
(half the Duvel is for you)
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тАО11-04-2004 08:08 PM
тАО11-04-2004 08:08 PM
Re: Non-paged dynamic memory
so the UCBs/ORBs/MISCs are for which devices - TCPIP or DECnet ?
Volker.
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тАО11-04-2004 08:44 PM
тАО11-04-2004 08:44 PM
Re: Non-paged dynamic memory
But my main question is : why is the net device not deallocated ? Bug in decnet (7.3 eco 3) ?
Wim
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тАО11-04-2004 08:52 PM
тАО11-04-2004 08:52 PM
Re: Non-paged dynamic memory
how are you going to ever document, analyze and find errors, if you 'delete the evidence' ? A forced crash would have provided the same results (after the reboot), but would have captured all the info needed...
If we assume those were NETn: devices, may there is a $DASSGN missing ?
Volker.
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тАО11-04-2004 09:14 PM
тАО11-04-2004 09:14 PM
Re: Non-paged dynamic memory
But without a crash dump to enjoy its hard to say.
Purely Personal Opinion
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тАО11-04-2004 09:32 PM
тАО11-04-2004 09:32 PM
Re: Non-paged dynamic memory
I took the source of the application and it seems Volker is right. There is a dassgn missing (or my C knowledge is too bad and I misunderstood the coding).
Wim
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тАО05-29-2005 08:46 PM
тАО05-29-2005 08:46 PM
Re: Non-paged dynamic memory
Same problem again on a different node. This time with a crash dump.
This time all non paged dynamic memory is gone (and node went into hang). Show pool/sum shows 52% is going to type unknown. Any suggestions ?
Wim