MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/01/99 through 07/31/99
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 146,838 8,560,898
MED90 30,234 952,300
MED85 18,272 338,471
MED80 13,452 168,327
MED75 11,066 107,143
MED66 10,689 106,743
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,231 107,073
2-4 a.m. 2,888 57,246
4-6 a.m. 450 30,829
6-8 a.m. 2,769 134,727
8-10 a.m. 18,951 805,165
10-12 a.m. 41,241 1,813,913
12-2 p.m. 42,180 1,834,258
2-4 p.m. 49,403 2,193,801
4-6 p.m. 38,092 1,683,094
6-8 p.m. 17,616 826,135
8-10 p.m. 9,357 496,947
10-12 p.m. 5,373 250,694
__________ _____________ _________________
Total: 230,551 10,233,882
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 3,003
Davis 2,169
Irvine 429
Los Angeles 2,114
Riverside 150
San Diego 4,243
San Francisco 5,628
Santa Barbara 40
Santa Cruz 301
Lawrence Berkeley 742
Lawrence Livermore 149
Los Alamos 0
MELWEB 207,743
Other - UC 442
Other-Network UC 3,398
_____
230,551
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 23,008
Davis 21,176
Irvine 4,030
Los Angeles 21,795
Riverside 688
San Diego 31,303
San Francisco 60,389
Santa Barbara 4,377
Santa Cruz 11
Lawrence Berkeley 4,303
Lawrence Livermore 1,515
Los Alamos 0
MELWEB 10,018,955
Other - UC 10,060
Other-Network UC 32,272
_____
10,233,882
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.3
Standard deviation in seconds 5.6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 23:14
Average session length (minutes:seconds) 25:57
Longest session recorded (minutes:seconds) 341:43
Average number of searches completed per session 0.0
Retrievals per search - median 4.0
Retrievals per search - average 343.7
Retrievals per search - standard deviation 4112.0
Percent of searches completed with 0 results 29.2%
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 230,551 10.8%
PRESENT 1,834,719 85.7%
INIT or CLOSE 71,029 3.3%
OTHER 3,761 0.2%
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 16,804 4.9% 6,897 41.0% 4 698.2 3418.0
PERSONAL AUTHOR 79,844 23.3% 21,302 26.7% 7 83.7 834.8
TITLE WORD 25,244 7.4% 9,260 36.7% 3 158.0 1815.1
SUBSET 785 0.2% 160 20.4% 43 361.0 1649.3
SUBJECT WORD 2,220 0.6% 1,236 55.7% 10 1136.2 5902.5
SUBJECT 10,393 3.0% 5,949 57.2% 18 495.7 2750.0
EXACT SUBJECT 18,120 5.3% 4,771 26.3% 33 428.3 2519.5
MAJOR SUBJECT 819 0.2% 335 40.9% 25 387.4 1715.4
EXACT MAJOR SUBJ 1,549 0.5% 318 20.5% 18 199.3 790.6
EXACT TITLE 2,016 0.6% 1,088 54.0% 1 15.2 153.1
TREE NUMBER 4 0.0% 1 25.0% 86 91.7 9.8
EXACT JOURNAL 3,889 1.1% 1,142 29.4% 103 1112.9 2631.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 252 0.1% 103 40.9% 32 492.5 1512.4
KEYWORD 119838 35.0% 32,898 27.4% 18 667.2 6411.2
DATE 7,492 2.2% 2,162 28.9% 5 88.7 566.4
LANGUAGE 22,516 6.6% 6,077 27.0% 29 336.0 1753.9
UNIQUE ID 768 0.2% 126 16.4% 1 1.1 0.8
ADDED 1,711 0.5% 990 57.9% 6 20.0 40.7
PUB TYPE 8,933 2.6% 1,849 20.7% 24 155.9 619.6
AUTHOR AFFIL. 2,606 0.8% 1,203 46.2% 9 84.7 892.7
CHEMICAL NAME 34 0.0% 26 76.5% 6 488.4 838.2
EXACT CHEMICAL 18 0.0% 15 83.3% 1 110.0 188.8
AT 14,184 4.1% 3,999 28.2% 23 416.2 2233.6
AGE 874 0.3% 199 22.8% 27 129.4 360.3
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 369 0.1% 72 19.5% 74 274.7 650.1
XXS 707 0.2% 350 49.5% 38 1017.9 4170.6
XMXS 435 0.1% 193 44.4% 21 740.9 4012.7
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 47 0.0% 34 72.3% 14 391.7 961.2
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 72,857 31.6% 23,871 32.8% 8 248.8 1797.7
Single 157,694 68.4% 43,433 27.5% 15 586.9 5709.6
PRESENT commands, by type:
MARC 34.4%
OPAC 26.6%