MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/28/00 through 11/03/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,011 2,680,530
MED90 10,550 180,483
MED85 8,072 59,369
MED80 7,117 33,284
MED75 6,817 24,946
MED66 6,881 28,738
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,998 70,213
2-4 a.m. 629 23,378
4-6 a.m. 238 15,911
6-8 a.m. 1,279 46,830
8-10 a.m. 7,378 233,084
10-12 a.m. 15,389 565,130
12-2 p.m. 16,304 470,317
2-4 p.m. 17,221 605,358
4-6 p.m. 14,455 472,071
6-8 p.m. 6,867 245,653
8-10 p.m. 4,973 173,551
10-12 p.m. 2,717 85,854
__________ _____________ _________________
Total: 89,448 3,007,350
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 223
Davis 854
Irvine 72
Los Angeles 402
Riverside 53
San Diego 1,040
San Francisco 1,753
Santa Barbara 33
Santa Cruz 23
Lawrence Berkeley 86
Lawrence Livermore 16
Los Alamos 0
MELWEB 68,960
Searchlight 15,280
Other - UC 211
Other-Network UC 442
_____
89,448
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,649
Davis 6,836
Irvine 389
Los Angeles 6,912
Riverside 391
San Diego 8,887
San Francisco 13,542
Santa Barbara 109
Santa Cruz 264
Lawrence Berkeley 860
Lawrence Livermore 216
Los Alamos 0
MELWEB 2,900,916
Searchlight 57,913
Other - UC 1,050
Other-Network UC 6,416
_____
3,007,350
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:47
Average session length (minutes:seconds) 17:07
Longest session recorded (minutes:seconds) 202:58
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 433.6
Retrievals per search - standard deviation 5715.2
Percent of searches completed with 0 results 34.9%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 89,448 13.6%
PRESENT 524,369 80.0%
INIT or CLOSE 40,942 6.2%
OTHER 537 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,037 4.0% 2,111 41.9% 4 834.8 4002.7
PERSONAL AUTHOR 24,620 19.5% 7,371 29.9% 7 92.0 1263.7
TITLE WORD 9,116 7.2% 3,557 39.0% 3 172.4 2235.0
SUBSET 235 0.2% 33 14.0% 51 328.4 1235.0
SUBJECT WORD 239 0.2% 119 49.8% 8 2913.8 23770.6
SUBJECT 2,424 1.9% 1,217 50.2% 26 576.0 3046.9
EXACT SUBJECT 5,417 4.3% 1,346 24.8% 33 745.9 5298.1
MAJOR SUBJECT 270 0.2% 77 28.5% 9 392.8 2638.4
EXACT MAJOR SUBJ 720 0.6% 140 19.4% 35 639.3 5371.0
EXACT TITLE 831 0.7% 558 67.1% 1 49.1 509.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,152 0.9% 406 35.2% 474 1812.9 3113.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 12 0.0% 11 91.7% 72 72.0 0.0
KEYWORD 55,488 44.0% 20,198 36.4% 16 866.1 8675.7
DATE 2,486 2.0% 487 19.6% 5 115.5 902.8
LANGUAGE 6,608 5.2% 1,717 26.0% 29 354.7 1864.3
UNIQUE ID 542 0.4% 130 24.0% 1 1.0 0.2
ADDED 1,173 0.9% 522 44.5% 4 13.8 23.8
PUB TYPE 3,077 2.4% 899 29.2% 23 314.1 5370.0
AUTHOR AFFIL. 904 0.7% 469 51.9% 8 51.7 314.0
CHEMICAL NAME 33 0.0% 13 39.4% 3 734.7 3266.4
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 4,959 3.9% 1,508 30.4% 23 596.0 3744.3
AGE 290 0.2% 78 26.9% 15 105.8 352.6
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 111 0.1% 27 24.3% 19 295.0 904.2
XXS 202 0.2% 88 43.6% 13 2227.0 21582.9
XMXS 99 0.1% 38 38.4% 26 178.9 587.5
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 19 0.0% 15 78.9% 1,118 1117.0 1286.3
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 24,065 26.9% 8,200 34.1% 8 335.2 3830.8
Single 65,383 73.1% 23,007 35.2% 15 789.7 7948.9
PRESENT commands, by type:
MARC 29.5%
OPAC 30.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS