MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/26/01 through 06/01/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 45,425 2,340,280
MED90 10,311 147,679
MED85 7,974 63,709
MED80 7,075 28,517
MED75 6,772 20,263
MED66 6,919 22,713
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,056 58,708
2-4 a.m. 1,305 55,052
4-6 a.m. 337 29,929
6-8 a.m. 1,217 55,803
8-10 a.m. 5,706 167,594
10-12 a.m. 13,769 441,636
12-2 p.m. 14,640 469,899
2-4 p.m. 15,766 478,370
4-6 p.m. 13,602 395,537
6-8 p.m. 7,071 231,706
8-10 p.m. 5,131 128,990
10-12 p.m. 3,876 109,937
__________ _____________ _________________
Total: 84,476 2,623,161
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 444
Davis 541
Irvine 290
Los Angeles 416
Riverside 162
San Diego 727
San Francisco 821
Santa Barbara 59
Santa Cruz 8
Lawrence Berkeley 28
Lawrence Livermore 57
Los Alamos 0
MELWEB 65,784
Searchlight 14,404
Other - UC 149
Other-Network UC 586
_____
84,476
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,293
Davis 6,214
Irvine 1,839
Los Angeles 3,743
Riverside 983
San Diego 10,474
San Francisco 6,220
Santa Barbara 593
Santa Cruz 26
Lawrence Berkeley 303
Lawrence Livermore 921
Los Alamos 0
MELWEB 2,491,036
Searchlight 79,590
Other - UC 1,491
Other-Network UC 15,435
_____
2,623,161
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.5
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) 20:45
Average session length (minutes:seconds) 17:02
Longest session recorded (minutes:seconds) 244:21
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 386.1
Retrievals per search - standard deviation 4697.2
Percent of searches completed with 0 results 35.6%
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 84,476 13.9%
PRESENT 482,972 79.7%
INIT or CLOSE 38,099 6.3%
OTHER 622 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 4,980 4.3% 2,175 43.7% 4 989.7 5005.8
PERSONAL AUTHOR 23,030 19.9% 6,744 29.3% 7 100.8 1214.0
TITLE WORD 9,340 8.1% 3,729 39.9% 3 133.7 1401.8
SUBSET 160 0.1% 41 25.6% 22 253.9 904.6
SUBJECT WORD 140 0.1% 59 42.1% 7 990.9 5713.4
SUBJECT 2,250 1.9% 1,115 49.6% 15 398.6 2282.1
EXACT SUBJECT 3,962 3.4% 999 25.2% 32 817.9 5119.8
MAJOR SUBJECT 324 0.3% 184 56.8% 15 141.1 770.5
EXACT MAJOR SUBJ 369 0.3% 77 20.9% 26 456.7 1826.0
EXACT TITLE 808 0.7% 460 56.9% 1 109.0 1598.5
TREE NUMBER 2 0.0% 0 0.0% 295 294.5 408.0
EXACT JOURNAL 956 0.8% 270 28.2% 441 1879.2 3643.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 9 0.0% 1 11.1% 43 40.4 22.8
KEYWORD 52,403 45.2% 19,603 37.4% 15 775.4 7249.1
DATE 1,706 1.5% 466 27.3% 6 118.0 726.7
LANGUAGE 5,599 4.8% 1,617 28.9% 23 519.7 3492.0
UNIQUE ID 230 0.2% 39 17.0% 1 1.0 0.2
ADDED 1,099 0.9% 496 45.1% 5 24.0 60.1
PUB TYPE 2,419 2.1% 570 23.6% 23 226.9 1227.8
AUTHOR AFFIL. 665 0.6% 339 51.0% 8 82.7 732.7
CHEMICAL NAME 7 0.0% 5 71.4% 3 2.5 2.1
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 4,801 4.1% 1,721 35.8% 17 599.5 3861.9
AGE 199 0.2% 46 23.1% 44 3602.4 11719.6
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 112 0.1% 25 22.3% 31 390.3 1017.5
XXS 248 0.2% 104 41.9% 9 160.6 903.8
XMXS 73 0.1% 44 60.3% 9 959.2 2913.1
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 38 0.0% 33 86.8% 17 1030.4 2272.8
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 21,460 25.4% 7,484 34.9% 7 338.6 2883.3
Single 63,016 74.6% 22,624 35.9% 14 690.3 6562.3
PRESENT commands, by type:
MARC 28.5%
OPAC 33.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS