On Tue, Nov 14, 2006 at 10:34:31AM +0100, Dirk Becker wrote: > Our Samba file server seems to have a memory leakage. We are using samba > as file server out of the box (debian sarge) on kernel 2.6.16.31. > After a while users who have some shares and files open are acquiring > more and more memory until the smbd dies.
A wild guess is that this might be printer related instead of file related. > Here is a small shortcut from top: > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 13843 gxxxxx 16 0 51792 44m 2552 S 0.3 17.8 0:22.97 smbd > 13840 bxxxxx 17 0 31400 25m 2764 S 0.7 10.0 2:42.78 smbd > smbd is allocation and more memory. We are using user security and > smbpasswd as password backend. Ok, 44M is a lot but not entirely out of scope, depending on what your clients do. But it's very likely a memleak, true. > The output from 'smbcontrol 13843 pool-usage' shows: > global talloc allocations in pid: 13843 > name chunks bytes > ---------------------------------------- -------- -------- > msg_pool_usage 1 159 > lp_talloc 2 2 > connection_struct 1 1844 > pipe spoolss 0x922dfb0 0 0 > pipe spoolss 0x83f4380 0 0 > connection_struct 1 1844 > connection_struct 1 1844 > passdb internal SAM_ACCOUNT allocation 19 493 > passdb internal SAM_ACCOUNT allocation 17 503 > pdb_context internal allocation context 5 1513 > passdb internal SAM_ACCOUNT allocation 8 397 > ---------------------------------------- -------- -------- > TOTAL 55 8599 Ok, this looks innocent. So we have a problem out of the talloc memory space. How deep do you want to go? :-) I would do several steps: First, try with 3.0.23d. Second, recompile with -g and run smbd under valgrind --tool=memcheck. Be aware that valgrind makes smbd at least 10 times slower, so this is something for a non-productive server. Then get some smbd to chew that memory, and shut it down by disconnecting from the client or sending it the shutdown command. valgrind will then show you the blocks allocated and not freed, so we will at least see the allocation places that leak. Volker
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