On Thu, 2007-10-11 at 15:34 -0400, Paul Wouters wrote: > Hi, > > This isue is problably known, but I wanted to bring it up anyway. > > ExecSum: Running a 64bit Fedora 7 Test 2 with 1GB RAM fails to update Yes, we want yum to use less memory and be faster, hoever... > Long story: Yum failed me while trying to update from rawhide today: Not quite. > Transaction Summary > ============================================================================= > Install 50 Package(s) > Update 702 Package(s) > Remove 1 Package(s) > > Total download size: 976 M > Is this ok [y/N]: y > Downloading Packages: > [...] > Transaction Test Succeeded > Running Transaction > Updating : libgcc ################### [ 1/1461] > error: Couldn't fork %post: Cannot allocate memory > > The system was running X with default daemons. Memory usage shows this > as the top five users: > > Tasks: 137 total, 2 running, 135 sleeping, 0 stopped, 0 zombie > Cpu(s): 10.6%us, 1.3%sy, 0.0%ni, 88.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st > Mem: 1013676k total, 782344k used, 231332k free, 8788k buffers > Swap: 522104k total, 452872k used, 69232k free, 164116k cached You have 522MB of Swap, and 450MB is used. Add more swap. You may also find that you have a lot of dead memory due to updated files. prelink esp. is great for this. I've attached a simple python script I've used, it's not perfect but it shows roughly how much dead memory you have and will kind of show where it is. > When yum died, i checked the above usage, so it looks like yum tried to > use more then 300Mb of non shared RAM. That's pretty insane. Worst thing, > is that it had *completed* all the dependancy checks, so I'm a bit confused > why it still needs so much memory. All it needs at that point (it was > installing the 1st rpm), is the list of 752 package filenames in an > install-order list. Why is that taking up 300MB? 300MB to upgrade 1GB of data is excessive? -- James Antill -- <james.antill@xxxxxxxxxx> "Please, no. Let's not pull in a dependency for something as simple as a string library." -- Kristian Høgsberg <krh@xxxxxxxxxx>
#! /usr/bin/python -t
import os
# Decent (UK/US English only) number formatting.
import locale
locale.setlocale(locale.LC_ALL, '')
def loc_num(x):
""" Return a string of a number in the readable "locale" format. """
return locale.format("%d", int(x), True)
pids = []
for d in os.listdir("/proc/"):
try:
pid = int(d)
pids.append(pid)
except:
pass
def map_sz(x):
(beg, end) = x.split('-')
return (int(end, 16) - int(beg, 16))
files = {}
for pid in pids:
try:
try:
lines = open("/proc/%d/smaps" % pid).readlines()
smaps = True
except:
lines = open("/proc/%d/maps" % pid).readlines()
smaps = False
off = 0
while off < len(lines):
line = lines[off]
off += 1
try:
int(line[0])
except:
continue
data = line.split(None, 5)
try:
ino = int(data[4])
dev = int(data[3].split(":", 2)[0], 16)
except:
print "DBG: Bad line:", lines[off - 1]
print "DBG: data=", data
continue
if dev == 0:
continue
if ino == 0:
continue
if '(deleted)' not in data[5]:
continue
key = "%s:%d" % (data[3], ino)
if key not in files:
files[key] = lambda x: x # Hack
files[key].s_size = 0
files[key].s_rss = 0
files[key].s_shared_clean = 0
files[key].s_shared_dirty = 0
files[key].s_private_clean = 0
files[key].s_private_dirty = 0
files[key].referenced = 0
files[key].vsz = 0
files[key].pids = []
files[key].name = data[5]
files[key].vsz += map_sz(data[0])
try:
if smaps:
files[key].s_size += int(lines[off].split(None, 3)[1])
off += 1
files[key].s_rss += int(lines[off].split(None, 3)[1])
off += 1
files[key].s_shared_clean += int(lines[off].split(None, 3)[1])
off += 1
files[key].s_shared_dirty += int(lines[off].split(None, 3)[1])
off += 1
files[key].s_private_clean += int(lines[off].split(None, 3)[1])
off += 1
files[key].s_private_dirty += int(lines[off].split(None, 3)[1])
off += 1
try:
files[key].referenced += int(lines[off].split(None, 3)[1])
off += 1
except:
pass
except:
print "DBG: Bad data:", lines[off - 1]
files[key].pids.append(pid)
except:
pass
vsz = 0
s_size = 0
s_rss = 0
s_shared_clean = 0
s_shared_dirty = 0
s_private_clean = 0
s_private_dirty = 0
referenced = 0
for x in files.values():
vsz += x.vsz
s_size += x.s_size
s_rss += x.s_rss
s_shared_clean += x.s_shared_clean
s_shared_dirty += x.s_shared_dirty
s_private_clean += x.s_private_clean
s_private_dirty += x.s_private_dirty
referenced += x.referenced
print x.pids, loc_num(x.vsz), x.name,
print "\
=============================================================================="
print "num = %-20s" % loc_num(len(files))
print "vsz = %-20s" % loc_num(vsz)
print "\
------------------------------------------------------------------------------"
print "s_size = %-20s" % loc_num(s_size * 1024)
print "s_rss = %-20s" % loc_num(s_rss * 1024)
print "s_shared_clean = %-20s" % loc_num(s_shared_clean * 1024)
print "s_shared_dirty = %-20s" % loc_num(s_shared_dirty * 1024)
print "s_private_clean = %-20s" % loc_num(s_private_clean * 1024)
print "s_private_dirty = %-20s" % loc_num(s_private_dirty * 1024)
print "referenced = %-20s" % loc_num(referenced * 1024)
print "\
=============================================================================="
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