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MXS-1220: Implement JSON diagnostics for most routers

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All routers except the binlogrouter now fully implement the JSON
diagnostic entry point. The binlogrouter needs to be handled in a separate
commit as it produces a large amount of diagnostic output.
This commit is contained in:
Markus Mäkelä
2017-04-18 10:48:22 +03:00
committed by Markus Mäkelä
parent 25c8fb8556
commit eb3ff1cc7b
14 changed files with 127 additions and 161 deletions
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37
server/modules/routing/schemarouter/schemarouterinstance.cc
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@ -302,35 +302,30 @@ SchemaRouterSession* SchemaRouter::newSession(MXS_SESSION* pSession)
return rval;
}
void SchemaRouter::diagnostics(DCB* dcb)
json_t* SchemaRouter::diagnostics()
{
double sescmd_pct = m_stats.n_sescmd != 0 ?
100.0 * ((double)m_stats.n_sescmd / (double)m_stats.n_queries) :
0.0;
100.0 * ((double)m_stats.n_sescmd / (double)m_stats.n_queries) :
0.0;
/** Session command statistics */
dcb_printf(dcb, "\n\33[1;4mSession Commands\33[0m\n");
dcb_printf(dcb, "Total number of queries: %d\n",
m_stats.n_queries);
dcb_printf(dcb, "Percentage of session commands: %.2f\n",
sescmd_pct);
dcb_printf(dcb, "Longest chain of stored session commands: %d\n",
m_stats.longest_sescmd);
dcb_printf(dcb, "Session command history limit exceeded: %d times\n",
m_stats.n_hist_exceeded);
json_t* rval = json_object();
json_object_set_new(rval, "queries", json_integer(m_stats.n_queries));
json_object_set_new(rval, "sescmd_percentage", json_real(sescmd_pct));
json_object_set_new(rval, "longest_sescmd_chain", json_integer(m_stats.longest_sescmd));
json_object_set_new(rval, "times_sescmd_limit_exceeded", json_integer(m_stats.n_hist_exceeded));
/** Session time statistics */
if (m_stats.sessions > 0)
{
dcb_printf(dcb, "\n\33[1;4mSession Time Statistics\33[0m\n");
dcb_printf(dcb, "Longest session: %.2lf seconds\n", m_stats.ses_longest);
dcb_printf(dcb, "Shortest session: %.2lf seconds\n", m_stats.ses_shortest);
dcb_printf(dcb, "Average session length: %.2lf seconds\n", m_stats.ses_average);
json_object_set_new(rval, "longest_session", json_real(m_stats.ses_longest));
json_object_set_new(rval, "shortest_session", json_real(m_stats.ses_shortest));
json_object_set_new(rval, "average_session", json_real(m_stats.ses_average));
}
dcb_printf(dcb, "Shard map cache hits: %d\n", m_stats.shmap_cache_hit);
dcb_printf(dcb, "Shard map cache misses: %d\n", m_stats.shmap_cache_miss);
dcb_printf(dcb, "\n");
json_object_set_new(rval, "shard_map_hits", json_integer(m_stats.shmap_cache_hit));
json_object_set_new(rval, "shard_map_misses", json_integer(m_stats.shmap_cache_miss));
return rval;
}
uint64_t SchemaRouter::getCapabilities()