[Bucardo-general] Swap replication latency
Alex Balashov
abalashov at evaristesys.com
Wed May 11 13:46:46 UTC 2011
On 05/11/2011 09:44 AM, Alex Balashov wrote:
> On 05/11/2011 09:41 AM, Alex Balashov wrote:
>
>> What I'm getting out of the log file by following the activity of a
>> particular KID, as you suggested, is that it's executing statements very
>> slowly for no apparent reason. Note the timestamps:
>
> Note: I have benchmarked these statements. They do not inherently run
> slowly, with or without user-space triggers attached. At most they'd
> take a few milliseconds, if that.
>
> In the case of the UPDATE statements, the WHERE criteria are all
> properly composite-indexed.
>
One more message - sorry!
Here's where things are at as of this morning, just as a data point:
[root at db ~]# bucardo_ctl status
Days back: 3 User: bucardo Database: bucardo PID of Bucardo MCP: 20198
Name Type State PID Last_good Time I/U/D
Last_bad Time
====================+=====+===========+=====+=========+=====+==========+========+====
xxxxxx_cdr_sync | S |WAIT:11m17s|20291|11m17s |6m4s
|1291/161/0|19m48s |1m8s
xxxxxx_location_sync| S |WAIT:2m42s |20292|2m43s
|8m20s|14/1973/13|19m48s |1m8s
xxxxxx_static_sync | S |WAIT:7s |20293|7s |7s |0/14/0
|19m48s |15s
The 'static' sync is the one consisting of 45 very slow-moving tables.
The 'location' sync largely consists of UPDATE statements, and the 'cdr'
sync consists mostly of INSERTs.
The delta table currently stands at around ~51,000 and growing, even
with my ultra-frequent purging.
--
Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/
More information about the Bucardo-general
mailing list