MINOR: stats: add the estimated need of concurrent connections per server
The max_used_conns value is used as an estimate of the needed number of
connections on a server to know how many to keep open. But this one is
not reported, making it hard to troubleshoot reuse issues. Let's export
it in the sessions/current column.
diff --git a/src/stats.c b/src/stats.c
index 351b79f..1a453c3 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -247,6 +247,7 @@
[ST_F_IDLE_CONN_CUR] = { .name = "idle_conn_cur", .desc = "Current number of unsafe idle connections"},
[ST_F_SAFE_CONN_CUR] = { .name = "safe_conn_cur", .desc = "Current number of safe idle connections"},
[ST_F_USED_CONN_CUR] = { .name = "used_conn_cur", .desc = "Current number of connections in use"},
+ [ST_F_NEED_CONN_EST] = { .name = "need_conn_est", .desc = "Estimated needed number of connections"},
};
/* one line of info */
@@ -997,6 +998,7 @@
"<tr><th>Current idle connections:</th><td>%s</td></tr>"
"<tr><th>- unsafe:</th><td>%s</td></tr>"
"<tr><th>- safe:</th><td>%s</td></tr>"
+ "<tr><th>Estimated need of connections:</th><td>%s</td></tr>"
"<tr><th>Active connections limit:</th><td>%s</td></tr>"
"<tr><th>Idle connections limit:</th><td>%s</td></tr>"
"</table></div></u>"
@@ -1010,6 +1012,7 @@
U2H(stats[ST_F_SRV_ICUR].u.u32),
U2H(stats[ST_F_IDLE_CONN_CUR].u.u32),
U2H(stats[ST_F_SAFE_CONN_CUR].u.u32),
+ U2H(stats[ST_F_NEED_CONN_EST].u.u32),
LIM2A(stats[ST_F_SLIM].u.u32, "-"),
stats[ST_F_SRV_ILIM].type ? U2H(stats[ST_F_SRV_ILIM].u.u32) : "-",
@@ -1703,6 +1706,7 @@
stats[ST_F_IDLE_CONN_CUR] = mkf_u32(0, sv->curr_idle_nb);
stats[ST_F_SAFE_CONN_CUR] = mkf_u32(0, sv->curr_safe_nb);
stats[ST_F_USED_CONN_CUR] = mkf_u32(0, sv->curr_used_conns);
+ stats[ST_F_NEED_CONN_EST] = mkf_u32(0, sv->est_need_conns);
/* status */
fld_status = chunk_newstr(out);