xchache - segfault at

Надо смотреть.

телепаты, ау? так?

ОС? версии используемого ПО, xcache? ставили xcache из дистрибутива или собирали сами?

поставьте пакеты с отладочными символами, пусть генерируются core-файлы и смотрите дальше дебагером в чем там проблема.

php -v

PHP 5.2.6-1+lenny10 (cli) (built: Mar 21 2011 16:45:52)

Copyright (c) 1997-2008 The PHP Group

Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies

with XCache v1.2.2, Copyright (c) 2005-2007, by mOo

with Zend Optimizer v3.3.9, Copyright (c) 1998-2009, by Zend Technologies

apache2 -v

Server version: Apache/2.2.9 (Debian)

Server built: Dec 31 2010 20:16:52

uname -a

2.6.26-2-amd64 #1 SMP Thu Nov 25 04:30:55 UTC 2010 x86_64 GNU/Linux

cat /etc/php5/apache2/conf.d/xcache.ini

# configuration for php Xcache module

[xcache-common]

;; install as zend extension (recommended), normally "$extension_dir/xcache.so"

zend_extension = /usr/lib/php5/20060613/xcache.so

[xcache]

; ini only settings, all the values here is default unless explained

; select low level shm/allocator scheme implemenation

xcache.shm_scheme = "mmap"

; to disable: xcache.size=0

; to enable : xcache.size=64M etc (any size > 0) and your system mmap allows

xcache.size = 256M

; set to cpu count (cat /proc/cpuinfo |grep -c processor)

xcache.count = 8

; just a hash hints, you can always store count(items) > slots

xcache.slots = 8K

; ttl of the cache item, 0=forever

xcache.ttl = 0

; interval of gc scanning expired items, 0=no scan, other values is in seconds

xcache.gc_interval = 0

; same as aboves but for variable cache

xcache.var_size = 64M

xcache.var_count = 1

xcache.var_slots = 8K

; default ttl

xcache.var_ttl = 0

xcache.var_maxttl = 0

xcache.var_gc_interval = 300

xcache.test = Off

; N/A for /dev/zero

xcache.readonly_protection = Off

; for *nix, xcache.mmap_path is a file path, not directory.

; Use something like "/tmp/xcache" if you want to turn on ReadonlyProtection

; 2 group of php won't share the same /tmp/xcache

; for win32, xcache.mmap_path=anonymous map name, not file path

xcache.mmap_path = "/dev/zero"

; leave it blank(disabled) or "/tmp/phpcore/"

; make sure it's writable by php (without checking open_basedir)

xcache.coredump_directory = ""

; per request settings

xcache.cacher = On

xcache.stat = On

xcache.optimizer = Off

[xcache.coverager]

; per request settings

; enable coverage data collecting for xcache.coveragedump_directory and xcache_coverager_start/stop/get/clean() functions (will hurt executing performance)

xcache.coverager = Off

; ini only settings

; make sure it's readable (care open_basedir) by coverage viewer script

; requires xcache.coverager=On

xcache.coveragedump_directory = ""

sysctl -A | grep kernel.shm

либо уменьшите выделяемую память xcache - либо увеличьте данные переменные (shmall, возможно shmax)

kernel.shmmax = 33554432

kernel.shmall = 2097152

kernel.shmmni = 4096

либо уменьшите выделяемую память xcache - либо увеличьте данные переменные (shmall, возможно shmax)

а какие критерии для увеличения переменных/уменьшения выделяемой памяти?

free

total used free shared buffers cached

Mem: 8194004 8138272 55732 0 395532 5197336

-/+ buffers/cache: 2545404 5648600

Swap: 4200888 0 4200888

По идее увеличивать некуда уже (((

kref:~# cat /proc/meminfo

MemTotal: 8194004 kB

MemFree: 48612 kB

Buffers: 322676 kB

Cached: 5229648 kB

SwapCached: 0 kB

Active: 4103608 kB

Inactive: 3596308 kB

SwapTotal: 4200888 kB

SwapFree: 4200888 kB

Dirty: 385092 kB

Writeback: 4 kB

AnonPages: 2147648 kB

Mapped: 620400 kB

Slab: 381260 kB

SReclaimable: 347876 kB

SUnreclaim: 33384 kB

PageTables: 20184 kB

NFS_Unstable: 0 kB

Bounce: 0 kB

WritebackTmp: 0 kB

CommitLimit: 8297888 kB

Committed_AS: 4400440 kB

VmallocTotal: 34359738367 kB

VmallocUsed: 288244 kB

VmallocChunk: 34359450019 kB

HugePages_Total: 0

HugePages_Free: 0

HugePages_Rsvd: 0

HugePages_Surp: 0

Hugepagesize: 2048 kB

xcache.size = 256M - многовато. уменьши и потести - апач рестартани.

Сделай корку - и gdb