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IDS Forum

Re: Informix RSS Monitoring

Posted By: Informix DBA
Date: Friday, 9 January 2015, at 10:47 a.m.

In Response To: Re: Informix RSS Monitoring (Art Kagel)

Hi Art,

Thank you yes I know about those tables. Though Informix must be using
something else to calculate the 2 values I am interested in i.e. backlogs
and lag times. Does anyone have a SQL to get these values?

Here is onstat -g rss verbose and below is data from the 2 sysmaster rss
tables. See the data doesn't match up.

Primary is called test 1 and RSS is called testrss

onstat -g rss verbose

IBM Informix Dynamic Server Version 11.70.FC7W2 -- On-Line -- Up 17:35:23
-- 10765312 Kbytes

Local server type: Primary
Index page logging status: Enabled
Index page logging was enabled at: 2015/01/08 17:06:41
Number of RSS servers: 1

RSS Server information:

RSS Server control block: 0x259ced028
RSS server name: testrss
RSS server status: Active
RSS connection status: Connected
RSS flow control:0/0
Log transmission status: Blocked
Next log page to send(log id,page): 1311303,15648
Last log page acked(log id,page): 1311303,13599
Time of Last Acknowledgement: 2015-01-09.10:39:29
Pending Log Pages to be ACKed: 2048
Approximate Log Page Backlog:121464
Sequence number of next buffer to send: 12898
Sequence number of last buffer acked: 12833
Supports Proxy Writes: N

Primary select * from sysmaster:syssrcrss
address 10096660520
server_name testrss
server_status Active
connection_status Connected
log_transmission_status Blocked
next_page_tosend_log_uniq 1311303
next_page_tosend_log_page 18272
seq_tosend 12980
last_seq_acked 12915
RSS select * from sysmaster:systrgrss
address 9840287328
source_server test1
connection_status Connected
last_received_log_uniq 1311303
last_received_log_page 16287
last_seq_received 12917
last_seq_acked 12917

On Thu, Jan 8, 2015 at 1:26 PM, Art Kagel <art.kagel@gmail.com> wrote:

> The data you want are in the sysmaster tables syssrcrss and systrgrss:
> $ dbstruct -d sysmaster -t '*rss'
>
> typedef struct SYSSRCRSS_S {
>
> int64_t address;
>
> char server_name[128];
>
> char server_status[20];
>
> char connection_status[20];
>
> char log_transmission_status[20];
>
> int next_page_tosend_log_uniq;
>
> int next_page_tosend_log_page;
>
> int seq_tosend;
>
> int last_seq_acked;
> } syssrcrss_t;
>
> typedef struct SYSTRGRSS_S {
>
> int64_t address;
>
> char source_server[128];
>
> char connection_status[20];
>
> int last_received_log_uniq;
>
> int last_received_log_page;
>
> int last_seq_received;
>
> int last_seq_acked;
> } systrgrss_t;
>
> The backlogs and lag times are calculated by comparing data between the
> Source server (syssrcrss) and Target server (systrgrss).
>
> Art
>
> Art S. Kagel, President and Principal Consultant
> ASK Database Management
> www.askdbmgt.com
>
> Blog: http://informix-myview.blogspot.com/
>
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and do not reflect on the IIUG, nor any other organization with which I am
> associated either explicitly, implicitly, or by inference. Neither do
> those opinions reflect those of other individuals affiliated with any
> entity with which I am affiliated nor those of the entities themselves.
>
> On Thu, Jan 8, 2015 at 1:16 PM, Informix DBA <in4mixdba@gmail.com> wrote:
>
> > Hi,
> >
> > We are running Informix 11.70.FC7W2 on Solaris. We are setting up a
> > read-only RSS node to our primary. We want to setup some monitoring to
> see
> > if the RSS node is keeping up the with primary. Any way to get some of
> the
> > information via a query that is similar to the onstat -g rss verbose
> > information? Specifically there is a line that says "Approximate Log Page
> > Backlog:".
> >
> > Also I see when you add the cluster in OAT there is a column called "Lag
> > Time" under the Cluster Topology, any idea on how they get this?
> >
> > Any other suggestions for RSS monitoring would be greatly appreciated.
> >
> > Thank You,
> >
> > --David
> >
> > --f46d041825e8957acc050c2809d2
> >
> >
> >
> >
>
> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --001a11c3c516cbb360050c282cdb
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--f46d043893c39919e3050c3a1276

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