On 10/11/2011 08:42 AM, Justin Gronfur wrote: > On 10/10/2011 02:46 PM, Rich Megginson wrote: >> I'm just trying to figure out what happens every 5 minutes inside the >> directory server. There is a thread that attempts to clean up >> tombstone entries and other state information. But if you are not >> using replication then that is not run. There are database threads >> such as checkpointing, log flushing, etc. but they run every 250 >> milliseconds. That's what this seems like - do you notice high I/O >> usage during the time when the server is pegged at 100% cpu? > > No high disk I/O, in fact vmstat is reporting substantially less disk > IO at that time than normal. The cpu is 94% user and 6% system during > those time. I'm not sure if attachments are allowed on this list, but > I used ptrace to grab the list of current operations (not full traces) > and filtered out all of the common select(), poll(), wait() calls. > What is left is attached. > > Let me know if you want me to try anything else or gather anymore data. This is helpful. Any chance you could paste the entire stack traces? For example, #0 0x0000003735c3c868 in slapi_get_mapping_tree_node_by_dn@plt () from /usr/lib64/dirsrv/libslapd.so.0 #0 0x0000003735c4ad38 in slapi_dn_normalize_ext () from /usr/lib64/dirsrv/libslapd.so.0 etc. are nice to have, but much better would be the entire stack traces of these calls so we can see where they are called from. > > Thanks, > Justin
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